A train 120 meter long is traveling at a speed of 60 km/h. The time in which it will pass a passerby, walking at 6 km/h in the same direction is-

A 8 sec

B 6 sec

C 3 sec

D 9 sec

Correct Answer: Option A

If both of them go to same direction than speed would be=(60-6)=54 km/h =(54x1000/3600) ms-1 so,train crosses the man within=120/15=8 sec