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A train 800 metres long is running at a speed of 78 km/hr. If it crosses a tunnel in 1 minute, then the length of the tunnel (in meters) is: ?->(Show Answer!)
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1. A train 800 metres long is running at a speed of 78 km/hr. If it crosses a tunnel in 1 minute, then the length of the tunnel (in meters) is:





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  • By: guest on 01 Jun 2017 05.48 pm
    Speed = 78 x 5 m/sec = 65 m/sec. 18 3 Time = 1 minute = 60 seconds. Let the length of the tunnel be x metres. Then, 800 + x = 65 60 3 3(800 + x) = 3900 x = 500.
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