A 180 meters long passenger train crosses a 360 meters long express train running in the opposite direction in 12 seconds. If the ratio of the speed of the passenger train to that of express train is 1 : 4 then find the speed of the express train?

A 180 meters long passenger train crosses a 360 meters long express tr

1.	A 180 meters long passenger train crosses a 360 meters long express train running in the opposite direction in 12 seconds. If the ratio of the speed of the passenger train to that of express train is 1 : 4 then find the speed of the express train?
A.	45 meters per second
B.	36 meters per second
C.	40 meters per second
D.	22.5 meters per second
E.	None of these
Answer» C. 40 meters per second

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A 180 meters long passenger train crosses a 360 meters long express train running in the opposite direction in 12 seconds. If the ratio of the speed of the passenger train to that of express train is 1 : 4 then find the speed of the express train?

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