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A 300 metre long train crosses a platform in 39 seconds while it crosses a signal pole in 18 seconds. What is the length of the platform?

speed = 300/18 = 50/3 m/s Let the length of the platform be x metres. 50/3 = ( x + 300) / 39 x = 350 m

Speed = (300/18)m/sec=50/3 m/sec

So Let the length of the platform be x metres (x+300)/39=50/3 3(x+300)=50x39 3x+900=1950 3x=1950-900 3x=1050 x=1050/3 x=350m so length of platform is 350m

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. What is the length of the platform?

Two trains are running at 40 km/hr and 20 km/hr respectively in the same direction. Fast train completely passes a man sitting in the slower train in 5 seconds. What is the length of the fast train?