Question

Two trains of same length 75 m are moving with speed 12 m/s and 13 m/s on parallel tracks. Find out time of crossing if they move in (1) same direction (2) opposite direction.​

Answer 1

Explanation:

As both the trains are moving in the opposite direction, the relative speed of each train with respect to each other be, v=10+15=25m/s

Here distance covered by each train = sum of their lengths =50+50=100m

∴ Required time=

25

100

=4sec