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A train takes 5 seconds to pass an electric pole. If the length of the train is 120 meters, the time taken by it to cross a railway platform 180 meter long, is ?
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- 121/2seconds
- 71/2seconds
- 61/2 seconds
- 31/3seconds
Correct Option: A
Speed of train = (120/5) = 24 m/sec.
Time takes to cross the platform
= (120 + 180)/24
= 121/2
