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A man swims to and fro along the bank of a river with speed v relative to water.if vel of flow is u then average speed of the man in to and fro motion is

A man swims to and fro along the bank of a river with speed v relative to water.if vel of flow is u then average speed of the man in to and fro motion is

Grade:11

1 Answers

Harsh Patodia IIT Roorkee
askIITians Faculty 907 Points
7 years ago
While going in the direction flow speed is v+u (For relative velocity to be u)
​While going against the flow, speed is v-u
Let distance one side be x
​Time taken to travel with direction of flow= x/v+u
​Time taken to travel against flow = x/v-u
Avg speed = Total distance by total time
substitute to get answer.

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