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
Pick one:
A) 80 m
B) 100 m
C) 120 m
D) 180 m
E) 160 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   ANSWER:100 m
<result>B</result>
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