Problems on Trains - Data Intensity 1 Questions and Answers Discussion Page.

13.	Two trains 140 m and 160 m long run at the speed of 60 km/hr and 40 km/hr respectively in opposite directions on parallel tracks. The time (in seconds) which they take to cross each other, is?
	A.	9
	B.	9.6
	C.	10
	D.	10.8

Answer: Option D

Explanation:

Relative speed = (60 + 40) km/hr = 100 x 5 m/sec = 250 m/sec.

18 9

Distance covered in crossing each other = (140 + 160) m = 300 m.

Required time =		300 x	9	sec	=	54	sec = 10.8 sec.
			250			5

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Published by:Michael Daani

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