Question

A man swims down steam 30 km and up steam 18km taking 3 hrs each time what is the velocity of current

Answer 1

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Answer 2

If u and v are the velocities of current and an respective, then for downstream, V(net)=u+v and for upstream V(net)=v-u.

Form 2 equations which will have 2 variables. Solve and get the answer. Ans is 2.

For detailed solution, refer the pic. I hope this helps.