A train 120 m long is traveling at a speed of 60 km / h. The time in which it will pass a passes by, walking at 6 km / h in the same direction is --
A
8 sec
B
6 sec
C
3 sec
D
9 sec
Correct Answer: 8 sec
Forbeing the same direction. So, the actual speed of train (60 - 6) km/h = 54 km/h Now, 54 km or 54000 m goes in 1 hour or 3600 second. ∴ 1 " " " 360054000 " ∴ 120 " " " 3600×12054000 " = 8 second