Multiple choice

A man can row 15 kmph in still water, but the river is running at 3 kmph. By how much he should increase his speed, if he has to reach a place 60km away in 4 hours. He is going against the current?

  1. 4 kmph

  2. 2 kmph

  3. 3 kmph

  4. No change required

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

Upstream speed = 15-3 = 12 kmph. For 60km in 4 hours, needed speed = 60/4 = 15 kmph. Increase needed = 15 - 12 = 3 kmph.

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