Two trains are running at 40 km/hr and 20 km/hr respectively in the same direction. Fast train completely passes a man sitting in the slower train in 5 seconds. What is the length of the fast train ?
A.
B.
C.
D.
Correct Answer :
A.
As Trains are moving in same direction, So, Relative Speed = 40-20 = 20 kmph = 20*(5/18) = 50/9 m/sec Length of Train= Speed * Time