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 =$(45+30)km/hr$
$(75\times \frac{5}{18})m/sec=\left(\frac{125}{6}\right)m/sec$
Distance covered = $(500+500)m=1000m$
Required time = $(1000\times \frac{6}{125})sec=48sec$