32.A
boatman can row 48 km downstream in 4 hr. If the speed of the current is 5
km/hr, then find in what time will be able to cover 8 km upstream?
[A]
6 hr
[C]
8 hr
[B]
4 hr
[D]
None of these
Answer : [B]
Explanation :
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Speed
of the boatman downstream =
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=
12 km/hr
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Speed
of current = 5 km/hr
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Let
the boatman takes t hours to cover 8 km upstream.
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Then,
speed of the current =
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(Downstream
Speed - Upstream Speed)
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