Ask iit jee aieee pet cbse icse state board community Discussion Response Post to: A man can swim with a speed of 4.0kph in still water. How long does he take to cross a river 1.0 km
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Abhishek S (454)

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Assuming that the man is swimming perpendicular to the bank.
Vector speed - 5 km/h. (vector sum of 4 and 3)
Distance is 1 km.

therefore time will be 12 minutes.


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