96.A
man can row 7.5 kmph in still water and he finds that it takes him twice as
long to row up as to row down the river. Find the rate of stream.
[A]
2
[C]
2.5
[B]
3
[D]
4
Answer : [C]
Explanation :
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Let
man’s rate against current be x kmph
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Man’s
rate with the current = 2x kmph
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1
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(2x + x)
= 7.5 (or) x = 5
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2
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So,
man’s rate against current = 5 kmph
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Man’s
rate with current = 10 kmph
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Rate
of current =
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1
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(10
- 5) kmph = 2.5 kmph
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2
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