Question
A train 450 metres long is running at a speed of 54
km/hr. If it crosses a tunnel in 1 minute, then the length of the tunnel (in meters) is:Solution
Let the length of the tunnel be ‘x’ meter. Speed = (54 × (5/18) m/sec = 15 m/sec Time = 1 minute = 60 seconds. Let the length of the tunnel be x metres. Then, (450 + x)/60 = 15 =>(450 + x) = 900 => x = 450 m
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