70.The
Speed of a boat in still water is 20 kmph. If it can travel 16 km upstream in 1
hr., What time it would take to travel the same distance downstream?
[A]
20
[C]
30
[B]
40
[D]
15
Answer : [B]
Explanation :
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Speed
of the current is ‘x’ kmph
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Upstream
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20
- x = 16 + 1
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x =
4 kmph
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downstream
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(20
+ 4) =
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16
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x = 40 min
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x
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