Question

A man can swim witha speed of 4 km/hr in still water. how long does he take to cross a river 1 km wide if the river flows steadily at 3 km/hr and he takes his strokes normal to the river current? how far down the river does he go , when he reaches the other bank

Answer 1

Hey there. The answer for your question is :

4km/h. Water speed = 3km/h. So, 4 - 3 km/h = 1km/h. Hence, he will take 100/1 = 100 minutes to cover the river from one side to the other side. He goes 1 km down.


Hope this answer helps you. If it helped you then don't forget to mark it as a brainliest answer or at least give me a thanks. Please. Thank you for your cooperation my friend.

Answer 2

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Speed of the man,

vm = 4 km/h

Width of the river = 1 km

Time taken to cross the river

= Width of the river/ speed of the river

= 1/4 h

=15 min

Speed of the river, vr = 3 km/h

Distance covered with flow of the river

Distance covered with flow of the river = vr × t

= vr × t = 3× 1/4 = 3/4 km

= 3/4 × 1000 = 750 m

I hope, this will help you

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