Question

A train crosses a pole in 15 seconds and a 100m. long platform in 25 seconds. what is the length of the train ?

Answer 1

the length of the train be x metres. Then,
x/15 = (x+100)/25
25x = 15(x+100)
x = 150 m

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!!!