34.
A boat goes 13 km upstream in 39 minutes. The speed of stream is 3 km/hr. The
speed of boat in still water is:
[A]
23 km/hr
[C]
25 km/hr
[B]
27 km/hr
[D]
None of these
Answer : [A]
Explanation :
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Speed
of the boat upstream
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Speed
of the stream = 3 km/hr
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Let
the speed of the boat in still water = x km/hr
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We
have, x - 3 = 20
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