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Grade: 11
        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
2 years ago

Answers : (1)

Harsh Patodia
IIT Roorkee
askIITians Faculty
897 Points
							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.
2 years ago
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