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A and B alone can complete a piece of work in 7 and 14 days, respectively. A and B work it together for 2 days and after 2 days, C joins them. Now, the work is completed in one day. In how many days can Calone do that work? [Answer Limit: 125 words] [UKPSC 2012]
A can complete the work in 7 days, so A's work rate is 17\frac{1}{7}71 of the work per day. B can complete it in 14 days, so B's work rate is 114\frac{1}{14}141 of the work per day. When A and B work together for 2 days: Combined work rate=17+114=214+114=314\text{Combined work rate} = \frac{1}{7}Read more
A can complete the work in 7 days, so A’s work rate is 71 of the work per day.
B can complete it in 14 days, so B’s work rate is 141 of the work per day.
When A and B work together for 2 days:
Combined work rate=71+141=142+141=143In 2 days, they complete:
Work done=2×143=146=73Remaining work:
1−73=74Let C’s work rate be x1. Together, A, B, and C complete the remaining work in 1 day:
143+x1=1This simplifies to:
x1=1−143=1411Thus,
x=1114Therefore, C can complete the work alone in 1114 days, or approximately 1.27 days
See lessThe coordinates of the vertices B and C of a triangle ABC are (1,-2) and (2, 3), respectively. Third vertex A lies on the line 2x+y-20. Area of the triangle is 8 square units. Find the coordinates of the vertex A. [Answer Limit: 50 words] [UKPSC 2012]
To find the coordinates of vertex A, we start with the formula for the area of a triangle given vertices A(x1,y1)A(x_1, y_1)A(x1,y1), B(1,−2)B(1, -2)B(1,−2), and C(2,3)C(2, 3)C(2,3): Area=12∣x1(−2−3)+1(3−y1)+2(y1+2)∣=8\text{Area} = \frac{1}{2} | x_1(-2 - 3) + 1(3 - y_1) + 2(y_1 + 2) | = 8Area=21∣Read more
To find the coordinates of vertex A, we start with the formula for the area of a triangle given vertices A(x1,y1), B(1,−2), and C(2,3):
Area=21∣x1(−2−3)+1(3−y1)+2(y1+2)∣=8Simplifying gives:
∣−5x1+3−y1+2y1+4∣=16 ∣−5x1+y1+7∣=16This results in two equations:
From the first equation:
y1=5x1+9From the second equation:
y1=5x1−23Next, we substitute these into the line equation 2x+y−20=0:
2x1+(5x1+9)−20=0⟹7x1−11=0⟹x1=711,y1=75×11+9=755+763=7118
2x1+(5x1−23)−20=0⟹7x1−43=0⟹x1=743,y1=75×43−23=7215−7161=754Thus, the coordinates of vertex A are either (711,7118) or (743,754).
See lessThere are 400 students in a class of a school. Of these 270 study Maths, 300 French and 50 Business Studies All those who study Maths, study French also. 20 study Maths and Business studies. 35 study French and Business studies. A student is selected at random. Find the probability that the selected student studies French but neither Maths nor Business Studies. Use Venn diagram only. [Answer Limit: 125 words] [UKPSC 2012]
To solve this problem using a Venn diagram: Define the Sets: 𝑀 M: Students studying Maths (270) 𝐹 F: Students studying French (300) 𝐵 B: Students studying Business Studies (50) Given Data: All Maths students also study French: ∣ 𝑀 ∩ 𝐹 ∣ = 270 ∣M∩F∣=270 Students studying both Maths and Business StudiRead more
To solve this problem using a Venn diagram:
Define the Sets:
𝑀
M: Students studying Maths (270)
𝐹
F: Students studying French (300)
𝐵
B: Students studying Business Studies (50)
Given Data:
All Maths students also study French:
∣
𝑀
∩
𝐹
∣
=
270
∣M∩F∣=270
Students studying both Maths and Business Studies:
∣
𝑀
∩
𝐵
∣
=
20
∣M∩B∣=20
Students studying both French and Business Studies:
∣
𝐹
∩
𝐵
∣
=
35
∣F∩B∣=35
Calculate Intersections:
Students studying all three subjects:
∣
𝑀
∩
𝐹
∩
𝐵
∣
=
20
∣M∩F∩B∣=20
Students studying only French and Business Studies:
∣
𝐹
∩
𝐵
∣
−
∣
𝑀
∩
𝐹
∩
𝐵
∣
=
35
−
20
=
15
∣F∩B∣−∣M∩F∩B∣=35−20=15
Students studying only French:
Total studying French:
300
−
270
−
15
=
15
300−270−15=15
Probability:
Students studying only French = 15
Total students = 400
𝑃
(
only French
)
=
15
400
=
3
80
P(only French)=
400
15
=
80
3
Thus, the probability that the selected student studies French but neither Maths nor Business Studies is
See less3
80
80
3
.
एक विद्यालय में किसी कक्षा के 400 विद्यार्थी हैं। उनमें से 270 गणित, 300 फ्रेंच तथा 50 विजनेस स्टडीज पड़ते हैं। ये सब जो गणित पड़ते हैं. फ्रेंच भी पड़ते हैं। 20 गणित व बिजनेस स्टडीज पड़ते हैं। 35 फ्रेंच व विजनेस स्टडीत पड़ते हैं। एक विद्यार्थी को पदृच्छया चुना जाता है। प्रायिकता ज्ञात कीजिये कि चुना गया विद्यार्थी फ्रेंच पड़ता है किन्तु गणित तथा विजनेस स्टडीत नहीं पढ़ता। केवल वेन आरेख का प्रयोग कीजिये। [उत्तर सीमा: 125 शब्द] [UKPSC 2012]
इस प्रश्न के लिए, हमें पहले विभिन्न विषयों में विद्यार्थियों की संख्या को व्यवस्थित करना होगा। मान लीजिए: MMM = गणित FFF = फ्रेंच BBB = बिजनेस स्टडीज दिए गए हैं: ∣M∣=270|M| = 270∣M∣=270 ∣F∣=300|F| = 300∣F∣=300 ∣B∣=50|B| = 50∣B∣=50 ∣M∩F∣=270|M \cap F| = 270∣M∩F∣=270 (सभी गणित पढ़ते हैं फ्रेंच भी) ∣M∩Read more
इस प्रश्न के लिए, हमें पहले विभिन्न विषयों में विद्यार्थियों की संख्या को व्यवस्थित करना होगा।
मान लीजिए:
दिए गए हैं:
फ्रेंच पढ़ने वाले विद्यार्थियों की कुल संख्या में से उन विद्यार्थियों को घटाते हैं जो गणित और बिजनेस स्टडीज पढ़ते हैं।
F के विद्यार्थियों की संख्या में से ∣M∩F∩B∣=20 और ∣F∩B∣=35 को घटाते हैं।
विभिन्न विषयों के विद्यार्थियों का योग:
Franc¸ais only=∣F∣−∣M∩F∣−∣F∩B∣+∣M∩F∩B∣=300−270−35+20=15अब, कुल विद्यार्थियों की संख्या 400 है।
प्रायिकता:
P(only F)=40015=803इस प्रकार, चुने गए विद्यार्थी के फ्रेंच पढ़ने की प्रायिकता 803 है।
See lessकिसी त्रिभुज ABC के दी शीर्ष बिन्दुओं B तथा C के निर्देशांक क्रमशः (1, 2) और (2.3) हैं। तीसरा शीर्ष A रेखा 2x+y-2=0 पर है। त्रिभुज का क्षेत्रफल ४ वर्ग इकाई है। शीर्ष A के निर्देशांक ज्ञात करें। [उत्तर सीमा: 50 शब्द] [UKPSC 2012]
त्रिभुज ABC का क्षेत्रफल 1 2 × base × height 2 1 ×base×height से दिया जाता है। बिंदु B(1, 2) और C(2, 3) के बीच की दूरी = ( 2 − 1 ) 2 + ( 3 − 2 ) 2 = 2 (2−1) 2 +(3−2) 2 = 2 . क्षेत्रफल = 4 वर्ग इकाई, तो: 1 2 × 2 × ℎ = 4 ⟹ ℎ = 8 2 = 4 2 . 2 1 × 2 ×h=4⟹h= 2 8 =4 2 . चूंकि A रेखा 2Read more
त्रिभुज ABC का क्षेत्रफल
1
2
×
base
×
height
2
1
×base×height से दिया जाता है।
बिंदु B(1, 2) और C(2, 3) के बीच की दूरी =
(
2
−
1
)
2
+
(
3
−
2
)
2
=
2
(2−1)
2
+(3−2)
2
=
2
.
क्षेत्रफल = 4 वर्ग इकाई, तो:
1
2
×
2
×
ℎ
=
4
⟹
ℎ
=
8
2
=
4
2
.
2
1
×
2
×h=4⟹h=
2
8
=4
2
.
चूंकि A रेखा
2
𝑥
+
𝑦
−
2
=
0
2x+y−2=0 पर है, इसे
𝑦
=
−
2
𝑥
+
2
y=−2x+2 में व्यक्त किया जा सकता है।
इससे
ℎ
=
∣
𝐴
𝑥
1
+
𝐵
𝑦
1
+
𝐶
∣
/
𝐴
2
+
𝐵
2
h=∣Ax
1
+By
1
+C∣/
A
2
+B
2
से
𝐴
A के निर्देशांक मिलेंगे।
समीकरण हल करने पर
𝐴
(
0
,
2
)
A(0,2) या
𝐴
(
1
,
0
)
A(1,0) मिलते हैं।
अतः शीर्ष A के निर्देशांक हैं (0, 2) और (1, 0)।
See lessIf the cost price of 150 shirts is equal to the selling price of 120 shirts, find the profit in percentage. [Answer Limit: 50 words] [UKPSC 2012]
Let the cost price of one shirt be CCC. Total cost price for 150 shirts = 150C150C150C. Selling price for 120 shirts = 150C150C150C. Selling price for one shirt = 150C120=1.25C\frac{150C}{120} = 1.25C120150C=1.25C. Profit per shirt = 1.25C−C=0.25C1.25C - C = 0.25C1.25C−C=0.25C. Profit percentage =Read more
Let the cost price of one shirt be C.
Total cost price for 150 shirts = 150C.
Selling price for 120 shirts = 150C.
Selling price for one shirt = 120150C=1.25C.
Profit per shirt = 1.25C−C=0.25C.
Profit percentage = C0.25C×100=25%.
Thus, the profit is 25%.
See lessयदि 150 कमीजों का खरोद मूल्य 120 कमीतों के विक्रय मूल्य के बराबर हो, तो प्रतिशत में लाभ ज्ञात करें। [उत्तर सीमा: 50 शब्द] [UKPSC 2012]
मान लीजिए, एक कमीज का खरीद मूल्य 𝐶 C है। तो, 150 कमीजों का खरीद मूल्य: 150 𝐶 150C यदि 120 कमीजों का विक्रय मूल्य 𝑆 S है, तो: 𝑆 = 150 𝐶 120 = 1.25 𝐶 ( एक कमीज के लिए ) S= 120 150C =1.25C(एक कमीज के लिए) लाभ = विक्रय मूल्य - खरीद मूल्य = 1.25 𝐶 − 𝐶 = 0.25 𝐶 1.25C−C=0.25C लाभ प्रतिशत = 0.25 𝐶 𝐶 × 100Read more
मान लीजिए, एक कमीज का खरीद मूल्य
𝐶
C है।
तो, 150 कमीजों का खरीद मूल्य:
150
𝐶
150C
यदि 120 कमीजों का विक्रय मूल्य
𝑆
S है, तो:
𝑆
=
150
𝐶
120
=
1.25
𝐶
(
एक कमीज के लिए
)
S=
120
150C
=1.25C(एक कमीज के लिए)
लाभ = विक्रय मूल्य – खरीद मूल्य =
1.25
𝐶
−
𝐶
=
0.25
𝐶
1.25C−C=0.25C
लाभ प्रतिशत =
0.25
𝐶
𝐶
×
100
=
25
%
C
0.25C
×100=25%
इसलिए, लाभ 25% है।
See lessThe average age of a class was 15 years. When 5 more boys, whose average age was 12 years 6 months were admitted in the class, the average age of the whole class was reduced by 6 months. How many students were there in the class originally? [Answer Limit: 50 words] [UKPSC 2012]
Let the original number of students be nnn. The total age of the class is 15n15n15n. The total age of the 5 new boys (average age 12.5 years) is 5×12.5=62.55 \times 12.5 = 62.55×12.5=62.5. The new average is 14.514.514.5 years. Thus, 15n+62.5n+5=14.5\frac{15n + 62.5}{n + 5} = 14.5n+515n+62.5=14.5SoRead more
Let the original number of students be n. The total age of the class is 15n.
The total age of the 5 new boys (average age 12.5 years) is 5×12.5=62.5.
The new average is 14.5 years. Thus,
n+515n+62.5=14.5Solving gives n=15.
Originally, there were 15 students in the class.
See lessIn what ways did communal tensions affect the constitutional development and political landscape in India?
Communal tensions had a profound impact on the constitutional development and political landscape in India during the late 19th and early 20th centuries. Here are several key ways these tensions influenced the situation: 1. Separate Electorates Institutionalization of Division: The introduction of sRead more
Communal tensions had a profound impact on the constitutional development and political landscape in India during the late 19th and early 20th centuries. Here are several key ways these tensions influenced the situation:
1. Separate Electorates
2. Influence on Political Parties
3. Constitutional Reforms and Compromises
4. Impact on Nationalist Movements
5. Role of Colonial Administration
6. Constitutional Framework Post-Independence
Conclusion
Communal tensions significantly affected constitutional development and the political landscape in India by fostering divisions, influencing party dynamics, and complicating the path to independence. These tensions not only shaped the nature of political negotiations and reforms but also had lasting implications for the formation of independent India, including the challenges of communal violence and the need for a secular and inclusive constitutional framework.
See lessDiscuss the impact of the Cripps Mission on the constitutional negotiations leading to independence.
The Cripps Mission, sent to India in March 1942, aimed to secure Indian cooperation during World War II and lay the groundwork for post-war constitutional negotiations. Its impact on the path to independence was significant, shaping the political landscape in several ways: 1. Proposals for Self-GoveRead more
The Cripps Mission, sent to India in March 1942, aimed to secure Indian cooperation during World War II and lay the groundwork for post-war constitutional negotiations. Its impact on the path to independence was significant, shaping the political landscape in several ways:
1. Proposals for Self-Governance
Offer of Dominion Status: The Cripps Mission proposed the idea of India achieving dominion status after the war, which was a step towards self-governance. This acknowledgment of Indian aspirations was significant, even if the offer fell short of full independence.
Constituent Assembly: The proposal included the establishment of a constituent assembly to frame a new constitution for India, which was a critical step toward self-determination and an important demand of the Indian National Congress (INC).
2. Failure to Satisfy Indian Leaders
Inadequate Provisions: The proposals did not meet the expectations of key Indian leaders, particularly the INC, which sought full independence rather than dominion status. The failure to address the demands for immediate self-rule led to disappointment and frustration among Indian political leaders.
Division Among Parties: The mission deepened divisions between the INC and the All India Muslim League. The INC rejected the proposals as insufficient, while the League saw an opportunity to advocate for a separate Muslim state, exacerbating communal tensions.
3. Impact on the INC’s Position
Rise of Radical Demands: The perceived inadequacy of the Cripps proposals led the INC to adopt a more radical stance, eventually culminating in the demand for “Complete Independence” in 1942, further distancing itself from negotiations with the British.
Call for Civil Disobedience: The failure of the Cripps Mission prompted the INC to launch the Quit India Movement later that year, calling for an end to British rule. This movement marked a significant escalation in the struggle for independence and highlighted the urgency of Indian aspirations.
4. British Response and Changing Strategy
Reassessment of Policy: The British government’s inability to secure Indian cooperation through the Cripps Mission led to a reassessment of their approach. It highlighted the need to engage more seriously with Indian leaders if they were to maintain control over India post-war.
Increased Pressure for Reform: The mission underscored the necessity for substantive constitutional reforms, as continued resistance from Indian leaders indicated that the existing colonial framework was unsustainable.
5. Communal Tensions
Strengthening of the Muslim League: The Cripps proposals, which offered some autonomy for provinces, bolstered the Muslim League’s position by reinforcing the idea of separate electorates and interests for Muslims, thereby heightening communal tensions.
Entrenchment of Communal Politics: The response to the Cripps Mission solidified the positions of both the INC and the Muslim League, leading to more entrenched communal politics and setting the stage for future conflicts over the structure of independent India.
Conclusion
See lessThe Cripps Mission significantly impacted constitutional negotiations leading to independence by recognizing Indian aspirations for self-governance while simultaneously failing to provide adequate solutions to the demands of Indian leaders. Its failure resulted in heightened political activism, radicalization of the INC, and a reassessment of British policy in India. The mission played a crucial role in shaping the trajectory toward independence, influencing the dynamics between various political parties and ultimately contributing to the eventual partition of India.