Latest GENPACT Aptitude Question SOLUTION: Two trains travel in opposite directions at 36 kmph and 45 kmph and a man sitting in slower train passes the faster train in 8 seconds.The length of the faster train is a)80 m b)10

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(#M40005208) GENPACT Numerical Ability question Problem on trains Keep an EYE

Two trains travel in opposite directions at 36 kmph and 45 kmph and a man sitting in slower train passes the faster train in 8 seconds.The length of the faster train is
a)80 m b)100 m c)120 m d)180 m

Asked In GENPACT (12 years ago)

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mukul  (11 years ago)

Ans is 100 m
Relative speed= 81 km/h
= 81 x 5/18 m/sec
=22.5 m/sec
length of slower train= speed x time
=36 x 8 km/hr
=288 x 5/18 m/sec
=80 m/sec
Let length of faster train= b
time cross to each other 8 = (80+b)x 18/(81 x 5)
=3240-1440=18b
1800/18= b
b=100 m

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shamserunnisa sk  (9 years ago)

Ans is 180 m

Relative Speed=(36+45)=81 km/h=81*5/18 m/sec= (45/2)m/sec
Length of the train=(45/2)*8 m=180m

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