Multiple choice

Passage

Read the following information and answer the given questions- Day 1: Ram covers 200 km along the stream and 150 km against the stream. The difference between the time taken to cover upstream and downstream is 10 hours. Day 2: Ram covers 40 km less than the previous day in along the stream and distance covered against the stream is equal to the distance covered by Ram in day 3 along the stream. Time taken to cover downstream distance is 8 hours less than the upstream distance. Day 3: Distance covered along the stream is 40 km more than the distance covered against the stream which is equal to the distance covered by Ram on day 1 along the stream. He takes 6 hours more to cover upstream than the downstream distance. Day 4: Time taken to covers 200 km along the stream and 100 km against the stream is same as the total time taken by Ram on day 3. The speed of stream on day 1, 2, 3 and 4 is 15kmph, 10 kmph, 20 kmph and 20 kmph respectively.

Sum of the speed of boats on day 2 and day 3 together is what percentage more or less than the sum of the speed of stream on day 1 and day 4 together?

  1. 120

  2. 160

  3. 100

  4. 200

  5. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This involves calculating boat speeds on days 2 and 3, stream speeds on days 1 and 4, then computing percentage difference. The result 100 indicates the sum of boat speeds is exactly equal to the sum of stream speeds - meaning 0% difference, but expressed as the base value 100.

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