Question

A train running at the speed of 108 kmph, crosses a 365 metre long platform in 21 seconds. What is the length of the train?

विकल्प

• 260 metres

• 275 metres

• 265 metres

• 285 metres

Answer 1

265 metres

Explanation:

Speed of train = 108 kmph

= `(108 xx 5/18)` m/second

= 30 m/second

If the length of train be x metre, then 

Speed of train = `"Length of train and platform"/"Time taken"`

⇒ 30 = `(x + 365)/21`

⇒ `30 xx 21 = x + 365`

⇒ 630 = `x + 365`

⇒ `x` = 630 – 365 = 265 metres