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 `400\ m` b. `450\ m` c. `560\ m` d. `600 m`

Options

A. 200 m
B. 300 m
C. 350 m
D. 400 m

Answer

D