A train 225m long, crosses a man standing on a platform, in 10 sec find the speed of the train How long will take to pass a platform 405 m long?
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speed of train = D/T = 225/10 = 45/2 m/s
total D now = 225+405 = 630m
time train will take = D/S = 630*2/45 = 28 सेकंड
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