Latest GENPACT Aptitude Question SOLUTION: A train 150 m long passes a km stone in 15 seconds and another train of the same length travelling in opposite direction in 8 seconds.The speed of the second train is a)60 kmph b)6

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(#M40005215) GENPACT question Problem on trains Keep an EYE

A train 150 m long passes a km stone in 15 seconds and another train of the same length travelling in opposite direction in 8 seconds.The speed of the second train is
a)60 kmph b)66 kmph c)72 kmph d)99 kmph

Asked In GENPACT (12 years ago)

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NARESH CNR  (8 years ago)

Given that two trains are of same length i.e..150 mtrs
first train passes the km stone in 15 seconds. here we have time and distance so speed=150/15=10 m/s
we need to find out the second train speed.
suppose the speed of the 2nd train is x m/s
Relative speed of two trains is (10+x)
==> (150+150)/(10+x)=8
==> (300)/(10+x)=8
==> 300=80+8x
==> 300-80=8x
==> 220=8x
:- x=55/2 m/s
convert m/s into km/ph
(55/2)*(18/5)=99kmph
;- The speed of the second train is 99Kmph

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