A river is flowing with velocity 4 km/h. So how much time a man will take to cross the river if there is no drift between start and finishing line. Velocity of man is 5 km/hr and width of river is 600 m.
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Answered by
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Time to cross the river, t=
Speed of man
Width of river
+
4kmh
−1
1km
=
4
1
h
Distance moved along the river in time t,
s=v
r
×t=3kmh
−1
×
4
1
h
=
4
3
km=750m
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