Question

Two goods train each 500 m long, are running in opposite directions on parallel tracks. Their speeds are 45 km/hr and 30 km/hr respectively. Find the time taken by the slower train to pass the driver of the faster one.?

Answer 1

Relative speed = (45 + 30) km/hr =75 km/hr
Speed in m/sec = 75 x 5/18 = 125/6 km/hr

Distance covered = Length of the slower train.
So, Distance covered = 500 m

=>Required time = 500 x 6/125 = 24 sec.