45.A
man rows to a place 48 km distant and back in 14 hours. He finds that he can
row 4 km with the stream in the same time as 3 km against the stream. The rate
of the stream is:
[A]
1 km/hr
[C]
1.8 km/hr
[B]
1.5 km/hr
[D]
3.5 km/hr
Answer : [A]
Explanation :
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Suppose
he moves 4 km downstream in x hours. Then,
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Speed
downstream =
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km/hr,
Speed upstream =
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km/hr.
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So,
Speed downstream = 8 km/hr, Speed upstream = 6 km/hr.
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Rate
of the stream =
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(8
- 6) km/hr = 1 km/hr.
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