A train is travelling at 48 kmph It crosses another train having half of its length travelling in op...........

Quantitative Aptitude ( CCS) Problems on trains

A train is travelling at 48 kmph. It crosses another train having half of its length, travelling 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?

400m

360m

580m

500m

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Explanation:

1.5 times the length of the first train
= (48+42)×5/18×12 = 300 metre
⇒ Length of the first train =200 metre
Distance covered by the the first train in 45 seconds
= 48×5/18×45 = 600 metre
Therefore, length of the platform
= 600−200=400 metre

Hence, option 1 is the correct answer.