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]. 230 m

[B]. 240 m

[C]. 260 m

[D]. 320 m

✅ The correct answer is option A.
Relative speed = (120 + 80) km/hr

200 x
5
m/sec

500
m/sec.

Let the length of the other train be x metres.

Then,
x + 270
=
500

9
9

x + 270 = 500
x = 230.

62. 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?