Discussion :: Problems on Trains

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 : Option B
Explanation :
Relative speed =  = (45 + 30) km/hr 
=\((75\times\frac{5}{18})m/sec\)  
=\( (\frac { 125 } { 6 } ) m/sec\) 
We have to find the time taken by the slower train to pass the DRIVER of the faster train and not the complete train.
So, distance covered = Length of the slower train.
Therefore, Distance covered = 500 m.
Required time = \((500\times\frac{6}{125})\) = 24sec
Be The First To Comment