Question

A train is traveling at 48 kmph . It crosses another train having half of its length , traveling in opposite direction at 42 kmph, in 12 seconds. It also passes a railway platform in 45 seconds. What is the length of the platform ?

A) 500 B) 400 C) 360 D) 480

Answer 1

Answer:

D is the answer,hope it helped

Step-by-step explanation:

Relative speed = (48+42) kmph = 90 kmph = (90 x 5 / 18) m/s = 25 m/s. Time taken = 12 seconds. Distance covered by the first train = its own length + that of the other one = 1.5X meters. According to given, 1.5X = 25 x 12 => X = 25 x 12 / 1.5 = 200.