Time and Work - Arithmetic Aptitude Questions and Answers

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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

130

360

500

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

" src="/uploads/d_images/m_img_0_1617181673.gif" /> 3(800 + x) = 3900

" src="/uploads/d_images/m_img_0_1617181673.gif" /> x = 500.

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