Question

Two trains are each 50 m long moving parallel towards each
other at speeds 10 m/s and 15 m/s respectively, at what time
will they pass each other?
() 8s
(b) 4s
(c) 2s
(d) 6 s​

Answer 1

Answer:

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= 100÷25=4sec