Problems on Trains - Arithmetic Aptitude Questions and Answers

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The length of the bridge, which a train 130 metres long and travelling at 45 km/hr can cross in 30 seconds, is:

200 m

225 m

245 m

250 m

Answer : Option C

Explanation :

Speed =		$[45 * \frac { 5 } { 18 } ]$		m/sec	=	$[\frac { 25 } { 2 } ]$		m/sec.

Time = 30 sec.

Let the length of bridge be x metres.

Then, $\frac { 130+ X } { 30 }$		= $\frac { 25 } { 2 }$