A car travelling at 60km/h overtakes another car travelling at 42km/h.Assuming each car to be 5m long, find the time taken during the overtake and the total road distance used for the overtake.

hi ankur,

1st of all calculate the relative velocity between these 2 cars ,ie, (60-42) = 18 km/hr.

now mke unit conversion then relative velocity becomes 5m/s.......

since to overtake the 2nd car has to travel 10m as 5m is the length of each car , so 5m to catch up the other car and 5m to clear it.

time taken to do so ,t = 10/5 = 2 sec

to find road distance ,we simply calculate distance travelled by 2nd car...

s = ut

u = 60km/h = 16.7m/s

s = 16.7 *2 = 33.3m