Problems on Trains - Arithmetic Aptitude Questions and Answers

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Two trains are moving in opposite directions @ 60 km/hr and 90 km/hr. Their lengths are 1.10 km and 0.9 km respectively. The time taken by the slower train to cross the faster train in seconds is:

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Answer : Option A

Explanation :

Relative speed = (60+ 90) km/hr

=	$[150* \frac { 5 } { 18 } ]$			m/sec

=	$[\frac { 125 } {3 } ]$		m/sec.

Distance covered = (1.10 + 0.9) km = 2 km = 2000 m.

Required time =[ 2000 x $\frac { 3 } { 125 } ]$				sec = 48 sec.

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