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A car from X to Y with a uniform speed v...

A car 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_dv_u)/(v_d+v_u)`

B

`sqrt(v_uv_d)`

C

`(v_dv_u)/(v_d+v_u)`

D

`(v_u+v_d)/2`

Text Solution

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The correct Answer is:
A
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