Current location - Training Enrollment Network - Mathematics courses - It takes 26 seconds for a train to cross a 396m bridge and 18 seconds to cross a 252m tunnel.
It takes 26 seconds for a train to cross a 396m bridge and 18 seconds to cross a 252m tunnel.
Because it takes 26 seconds for a train to cross a 396-meter bridge and 18 seconds to cross a 252-meter tunnel.

So: the train traveled 396-252= 144 meters in 8 seconds.

So: the speed of the train is144/8 =18m/s.

So: the train length is 26* 18-396=468-396=72 meters.

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