Question

a train travelling at the speed of 36 km per hour crosses in 98 M long platform in 20 seconds find the length of the train

Answer 1

speed of the train =38 kmph=38000/3600=95/9m/s
length of the platform= 98m
let the length of the train =x
98=x metre is travelled in 20 seconds(x=length of the train)
1sec =95/9m
20 sec=95/9*20=1900/9 metres=211.1 m
98+x=211.1
x=211.1-98
x=113.1m(length of the train)
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