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A car moves from X to Y with a uniform s...

A car moves from `X` to `Y` with a uniform speed `v_u` and returns to `Y` with a uniform speed `v_d`. The average speed for this round trip is :

A

`(2v_d v_u)/(v_d + v_u)`

B

`sqrt(v_u v_d)`

C

`(v_d v_u)/(v_d + v_u)`

D

`(v_u + v_d)/(2)`

Text Solution

Verified by Experts

The correct Answer is:
A
`(2v_d v_u)/(v_d + v_u)`
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