A train, #200# metres in length, is travelling at a speed of #40# #(km)/h#. How long the train will take to cross a person standing beside the railway line?

1 Answer
Soumalya Pramanik
Jun 3, 2018

See Below.
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Explanation:

The train will cross a person.

We know, The distance travelled by the train if it crosses a pole or a person or any object with negligible length (Yeah, That's Important) #=# The length of the Train.

So, The Distance Travelled by the Train = #200# metre.

The Train was travelling in a speed of #40# #km h^-1#.

So, The Time Taken by the train = #(200/1000)/40# hours. #= cancel(200)^5/(cancel(40) xx 1000)# hours #=1/200# hours #=(36cancel(00))/(2cancel(00))# seconds #= 18# seconds.

Thus, The train will take #18# seconds to cross the person.

Hope this helps.

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