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Arithmetic Ability
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Q.
Two trains of equal length , running in opposite directions , pass a pole in 18 and 12 seconds. The trains will cross each other in
A.
14.4 sec
B.
15.5 sec
C.
18.8 sec
D.
20.2 sec
View Answer
Correct choice: A
Explanation:
Let the length of the train be L metres Speed of first train = 3600/18 xL m/hour Speed of secxond train = 3600/12 xL m/hour When running in opposite directions, relative speed = 200 L + 300 L m/hour Distance to be covered = L + L = 2L metre Time taken = 2L/500 Lx3600 sec =14.4 sec
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