A train 500 m long passes a man, running at 9 km/hr in the same direction in which the train is ...
A train 500 m long passes a man, running at 9 km/hr in the same direction in which the train is going, in 20seconds. The speed of the train is:
Answer/Solution
99
Steps/Work
Speed of the train relative to man =500/20 m/sec
=25m/sec.
=25x18/5km/hr
= 90 km/hr.
Let the speed of the train be x km/hr. Then, relative speed = (x - 9) km/hr.
x - 9= 90 =99 km/hr.
Answer:D
=25m/sec.
=25x18/5km/hr
= 90 km/hr.
Let the speed of the train be x km/hr. Then, relative speed = (x - 9) km/hr.
x - 9= 90 =99 km/hr.
Answer:D