A 270 metres long train running at the speed of 120 kmph crosses another train running in opposite direction at the speed of 80 kmph in 9 seconds. What is the length of the other train.

A) 220

B) 260

C) 330

D) 230

Relative speed = (120 + 80) km/hr.

= (200 x 5)/18 m/sec.
= 500/9 m/sec.

Let the length of the other train be x metres.
Then,

(x + 270)/9 = 500/9

x + 270 = 500

x = 230.

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