A person travelling on a straight line moves with a uniform velocity `v_1` for a distance x and with a uniform velocity `v_2` for the next equal distance. The average velocity v is given by

Options

A. `v=(v_(1)+v_2)/(2)`
B. `v=sqrt(v_(1)v_(2))`
C. `2/v=1/v_(1)+1/v_(2)`
D. `1/v=1/v_(1)+1/v_(2)`

Answer

C