Question

A person driving a car with 72km/h,suddenly sees a boy. if the distance moved by a car, before person applies the brakes is 5m,the reaction time of person is?

Answer 1

by using formula the answer is 4

Answer 2

simple .distance moved is 5m and speed is 72km/h. convert speed into m/s units . 72×5/18 m/s=20m/s. So we have distance and speed find time . time =distance /speed =5/20=0.25 seconds.