A train speeds past a pole in 15 seconds and speeds past a platform 100 metres long in 25 second Its...........

Quantitative Aptitude ( CCS) Time & distance

A train speeds past a pole in 15 seconds and speeds past a platform 100 metres long in 25 second. Its length in metres is

200

150

Data inadequate

Let the length of the train be x metres and its speed be y m/sec.
Then, (x/y)= 15 $\Rightarrow$ y =(x/15)

(x+100)/25 = x/15

= 15(x + 100) = 25x

= 15x + 1500 = 25x

= 1500 = 10x

= x = 150 m.

Hence, option 2 is the correct answer.

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