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?

230 m
240 m
260 m
320 m
None of these

Correct Answer: 230 m

Explanation:

Relative speed = (120 + 80) km/hr

=	❨	200 x	5	❩m/sec
			18

=	❨	500	❩m/sec.
		9

Let the length of the other train be x metres.

Then,	x + 270	=	500
	9		9

⟹ x + 270 = 500

⟹ x = 230.

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