A train takes 5 seconds to pass an electric pole. If the length of the train is 120 metres, the time taken by it to cross a railway platform 180 metres long, is:
A. 12 seconds
B. 7 seconds
C. 6 seconds
D. 3 seconds
ANSWER : 12 seconds
A train takes 5 seconds to pass an electric pole. If the length of the train is 120 metres, the time taken by it to cross a railway platform 180 metres long, is:
A. 12 seconds
B. 7 seconds
C. 6 seconds
D. 3 seconds
ANSWER : 12 seconds