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A car travelling on a straight track mov...

A car travelling on a straight track moves with unifrom velocity of `v_1` for some time and uniform velocity `V_2` for the next equal time.The average velocity v is given by

A

`(sqrt(v_1v_2))`

B

`((v_1 + v_2)/(2))`

C

`((1/v_1) + (1/v_2))^-1`

D

`2((1/v_1) + (1/V_2))^-1`

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