A body covers one-third of the distance with a velocity `v_(1)` the second one-third of the distance with a velocity `v_(2)`, and the last one-third of the distance with a velocity `v_(3)`. The average velocity is:-
A. `(v_(1)+v_(2)+v_(3))/(3)`
B. `(3v_(1)v_(2)v_(3))/(v_(1)v_(2)+v_(2)v_(3)+v_(3)v_(1))`
C. `(v_(1)v_(2)+v_(2)v_(3)+v_(3)v_(1))/(3)`
D. `(v_(1)v_(2)v_(3))/(3)`
