DIRECTIONS for the question: Solve the following question and mark the best possible option.
Two trucks each of length 45 m running in opposite directions cross each other at speeds of 48 kmph and 60 kmph. What is the time taken by the faster truck to pass the driver of the slower truck?
A)
1 sec
B)
1.5 sec
C)
2 sec
D)
None of these
B
Relative speed of the two trucks = (48+60)×5/18 = 30 m/s
Thus, time taken by the faster truck to pass the driver of the slower truck = distance/speed = 45/30 = 1.5 seconds