Problems on Trains - Arithmetic Aptitude Questions and Answers

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A train travelling at a speed of 75 mph enters a tunnel 3 $\frac { 1 } { 4}$ miles long. The train is $\frac { 1 } { 4}$ mile long. How long does it take for the train

to pass through the tunnel from the moment the front enters to the moment the rear emerges?

2.5 min

3 min

3.2 min

3.5 min

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Answer : Option B

Explanation :

Total distance covered	= $(\frac { 7 } { 2 } +\frac { 1 } { 4 } ) miles$
	= $\frac { 15 } { 4 }$

Time taken

=
	$(\frac{15}{4*17})hrs$


	= $\frac { 1 } { 20 } hrs$

$(\frac{1}{20}\times60)min$

= 3 min

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