A person travels x distance with velocit...

A person travels x distance with velocity `v_1` and then x distance with velocity `v_2` in the same direction. The average velocity of the person is v, then the relation between v, `v_1` and `v_2` will be

A

`v=(v_1+v_2)/2`

B

`1/v=1/v_1+1/v_2`

C

`v=v_1+v_2`

D

`2/v=1/v_1+1/v_2`

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