A person driving a car with a speed 72km/h, suddenly sees a boy crossing the road

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

The following steps are to be followed to solve the query:

  1. Convert the speed in m/s.
  2. The reaction time is the time interval when the person sees the boy and presses the brakes. In this time interval, the person covers the distance say ā€˜sā€™.
  3. Use this distance and the speed in m/s to find the time as t = d/v. You should get the answer as 0.25 s.