90.A
swimmer covers a distance of 28 km against the current and 40 km in the
directions of the current. If in each case he takes 4 hours, then the speed of
the current is
[A]
3.5 km/hr
[C]
2.5 km/hr
[B]
1.5 km/hr
[D]
None of these
Answer : [B]
Explanation :
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Speed
of the swimmer upstream =
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=
7 km/hr
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Speed
of the swimmer downstream =
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=
10 km/hr
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Speed
of the stream =
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(Downstream
Speed - Upstream Speed)
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=
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(10
- 7) =
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=
1.5 km/hr.
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