GENPACT Company Numerical Ability Time Distance and Speed

A 270 m long train running at the speed of 120 kmph crosses another train running in opposite direction at the speed of 80 kmph in 9 seconds.What is the length of the other train?
a)230 m b)240 m c)260 m d)320 m

Read Solution (Total 2)

Ans is 230 m

speed of first train= (120 * 5/18)m/sec
= 100/3 m/sec
speed of other Train= (80 * 5/18)m/sec
= 200/9 m/sec
time to cross each other= 9 sec
Let x be the length of 2nd train
therefore 9 = (270+ x)/(100/3 +200/9)
500 = 270 + x
230m = x
11 years agoHelpfull: Yes(1) No(0)

s=D/T
200*5/18=X+270/9
=230
8 years agoHelpfull: Yes(1) No(0)

GENPACT Other Question

How long does a train 110 m long running at a speed of 72 kmph take to cross a bridge 132 m in length?
a)9.8 sec b)12.1 sec c)12.42 sec d)14.3 sec A 300 m long train crosses a platform in 39 seconds while it crosses a signal pole in 18 seconds.What is the length of the platform?
a)320 m b)350 m c)650 m d)none of these