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

15.	A train 800 metres long is running at a speed of 78 km/hr. If it crosses a tunnel in 1 minute, then the length of the tunnel (in meters) is?
	A.	130
	B.	360
	C.	500
	D.	540

Answer: Option C

Explanation:

Speed = 78 x 5 m/sec = 65 m/sec.

18 3

Time = 1 minute = 60 seconds.

Let the length of the tunnel be x metres.

Then,		800 + x		=	65
		60			3

3(800 + x) = 3900

x = 500.

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Published by:Michael Daani

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