Question

A train crosses a post in 15 second and a platform 100m long in 25 second what is the length

Answer 1

Hello...

As we know Speed = Distance/Time..
=> Speed of the train will be = 100m/25 sec
= 4m/sec...
.
.
.
.
So the length of the post will be...
=> Speed = 4m/sec..
Distance = T x S...
=> 15 x 4
= 60 m...
So the length of the post is 60 meter.

Answer 2

Given :

A train crosses a pole in 15 seconds and a 100m platform in 25 seconds.

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Find :

What is the length of the train?

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Calculations :

→ Speed = 100/10

→ Speed = 10 sec

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→ Length of the train = 15 × 10

→ Length of the train = 150 m

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Therefore, 150 m is the length of the train.

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VERIFICATION :

→ 150/10

→ 15 seconds

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HENCE PROVED!!!