A 125 m long train is running at 45 km/h. In how much time will it cross a tunnel 375 m long?

A 125 m long train is running at 45 km/h. In how much time will it

1.	A 125 m long train is running at 45 km/h. In how much time will it cross a tunnel 375 m long?
A.	45 s
B.	41 s
C.	42 s
D.	40 s
Answer» E.

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A 125 m long train is running at 45 km/h. In how much time will it cross a tunnel 375 m long?

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