Ratio of ages of A and B, 4 years later is 8:9 respectively. If average of present ages of A & B is 47 years, then find difference in present ages of A & B.
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Krishna travels 10 km to the south, then takes a left and travels 8 km. He then takes a right and travels 3 km; after which he travels in the southeast direction for 4 km and then towards the northeast ...