RRB JE exam Mathematics Important MCQs questions solved

Question No: 3

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

A. 400 m
B. 450 m
C. 560 m
D. 600 m
Answer: Option A