Q1: 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.
A
12 sec
B 48 sec
C 24 sec
D 60 sec
ANS:B - 24 sec
Relative speed =
= (45 + 30) km/hr
=
75 x
5
m/sec
18
=
125
m/sec.
6
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 =