Question

A train 200 m long passes a man standing on a platform in 10 seconds and passes the platform completely in 30 seconds. Find: (a) the speed of the train in km/h, (b) the length of the platform.

A Speed = 42 km/h, platform length = 400 m.
B Speed = 22 km/h, platform length = 300 m.
C Speed = 32 km/h, platform length = 470 m.
D Speed = 72 km/h, platform length = 400 m.
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