SOLUTION: A 100 metres long train is moving at 50 km/hr. An another train is 120 metres long is moving in opposite direction and crosses each other in 6 seconds. Find the speed of the second
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Question 775332: A 100 metres long train is moving at 50 km/hr. An another train is 120 metres long is moving in opposite direction and crosses each other in 6 seconds. Find the speed of the second train?
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
A 100 metres long train is moving at 50 km/hr. An another train is 120 metres long is moving in opposite direction and crosses each other in 6 seconds. Find the speed of the second train?
The sum of lengths of the trains is the distance the second train travels.
100+120m =220m=0.22km
Let speed of second train be x km/h
They are in opposite directions.
effective speed = x+50 km/h
Time = 6 seconds = 6/3600 seconds => 1/600 hours
d=rt
0.22=(x+50)*1/600
multiply by 600
0.22*600 =x+50
132=x+50
x=132-50
x=82 km/h
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