1.

At speed of 43.2 kmph crosses a standing man in 15 seconds.it will cross a 180 metre long platform in

Answer»

Speed of train = 43.2 KMPH = 43.2 × 5/18 = 12 m/s
Length of train = 12 × 15 = 180 m

To cross the platform of 180 m, train has to travel, 180+180 = 360 m

Time REQUIRED to cross platform
= 360/12 = 30 seconds



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