Tell me please! The train 520 m long passed minute and 20 seconds through the bridge 800 m long. The train in several hours passed the same speed through a tunnel in 1.5 minutes. What length of a tunnel? Please

Note: in calculations we will change time in seconds we Will find train speed: speed = distance: time = (bridge length + train length): time = (800+520): 80=1320:80=16.5 m/s In 1.5 min. will pass the train: 16.5*90=1485m Length of a tunnel is equal: 1485-520=965 m of Answer: 965 m
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