Aptitude and interest mean two different things. Aptitude is an inbuilt ability to learn something or perform certain activities, while interest indicates enthusiasm or passion for a particular area or field. Aptitude projects an inborn talent, which consists of skills such as analytical reasoning, solving problems, and decision-making-skills that are all required to become a civil servant. Interest motivates one to put more effort into achieving certain goals.

In the field of civil service performance, one has to be more than interested since, without essential aptitude, there is no possibility of success. A civil servant has to handle complex and dynamic situations, carry out key decisions, and exercise leadership. By nature, one needs to possess reasoning, leadership, and public administrative skills for excellence in such a profession. Without these qualities, even the best-motivated individual may find it hard to accomplish the pressures that may emanate in doing the job, either by inefficiency or risk of burnout.

But interest also plays a major role in developing one’s skill. An enthusiastic attitude toward their job will drive individuals to hone their skills and overcome challenges. Thus, success within a civil service career requires a balanced blend of both skill and interest; where the former provides the foundation, the latter sustains the momentum, leading to persistence and growth in what can be a challenging career.

Let the principal be P .

It’s said in the question that the money triples itself in 5 years. So, the amount after 5 years is 3P.

So, the simple intrest = Amount – Principal = 3P – P = 2P.

Now we know both the principal and simple intrest so we can use the formula of SI to find the answer.

( P * R * T  ) / 100  =  SI

=   (P * R  * 5 ) / 100   =  2P

=    R / 20                      =  2P / P

=     R                             =  2 * 20  =  40%

Alternatively , there is a simple shortcut to this.

When the question says the principal becomes n times in T years.

Then ,  R * T  =  ( n – 1 ) 100

In this case,  R * T = (3 -1 ) 100

= R * 5  =  200

= R         =  200 / 5 = 40%