54.The
Speed of a boat in still water is 10 kmph. If it can travel downstream 20 kms
in the same time as it can travel 12 kms upstream. What is the speed of the
current?
[A]
2
[C]
5
[B]
3
[D]
2.5
Answer : [D]
Explanation :
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Let
the speed of the current be ‘x’ kmph
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Speed
=
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distance
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Time
=
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distance
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time
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speed
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20
(10 - x) = 12 (10 + x);
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x = 2.5 kmph
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