Question

A train travels at 40 km per hour and crosses a signal post in 9 seconds what is the length of the train

Answer 1

Explanation:

First we will convert

KMPH--->MPS

so

40*5/18

=20*5/9

speed=100/9 m/s

Now

Speed=Distance/Time

distance=speed*time

Time=9sec

Therefore

distance=(100/9)*9

so

Distance=100m

Therefore length of train is 100m or 0.1km

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