Question

oa man swims in still water with Vmw and walks with speed v .find the minimum time required by the man to reach the opposite bank of a river flowing with speed Vw.only for moderator ok .not answering user because its a vast answer and jee question so please request don't give irrivalent answer.

Answer 1

here is u r answer
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Answer 2

Since the swimmer dive the river normal to the flow of river, therefore time taken by swimmer to cross the river 



In this time the swimmer will also go down the river by distance BC due to river current.