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31.
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A man rows downstream 32 km and 14 km upstream. If
he takes 6 hours to cover each distance, then the velocity (in kmph) of the
current is:
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A. 1.5 kmph
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B. 1.75 kmph
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C. 2 kmph
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D. 3 kmph
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Answer:
A.
Explanation:
Rate
downstream = [32/6] kmph; Rate upstream = [14/6] kmph.
∴ Velocity of current = 1/2[32/6 -
14/6] kmph = 3/2 kmph = 1.5 kmph.
