If x = a t + bt^(2), where x is the distance travelled by the body in kilometer while t is the time in second, then the unit of b is

If x = a t + bt^(2), where x is the distance travelled by the body in

1.	If x = a t + bt^(2), where x is the distance travelled by the body in kilometer while t is the time in second, then the unit of b is
Answer» km/s km-s `km//s^(2)` `km-s^(2)` ANSWER :C