A vechicle travels along a straight path between two places `alpha and beta`. It travels first half of the distance with a velocity of 72 km `h^(-1)` and the remaining distance with a velocity of 36 km `h^(-1)` then the average velocity of the vehicle is ______ m`s^(-1)`

Options

A. 11.3
B. 13.3
C. 15
D. 14

Answer

B

Explanation

A-d A body covering 5 m in every subsequent second moves with constant speed.
B-b if a body covers distance in unequal intervals of time, then is said to move with non- uniform speed.
C-a A lunar month is based on the periodic motion of the moon around the earth.
D-c The age a person is expressed in years.