A person travels along a straight road for the half time with a velocity v_(1) and the next half time with a velocity v_(2). The mean velocity v of the man is

A person travels along a straight road for the half time with a veloci

1.	A person travels along a straight road for the half time with a velocity v_(1) and the next half time with a velocity v_(2). The mean velocity v of the man is
Answer» `2/v - 1/v_(1) +(1)/(v_(2))` `v=(v_(1)+v_(2))/(2)` `v= SQRT(v_(1)+v_(2))` `v= sqrt((v_(1))/(v_(2)))` ANSWER :B