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a 100m long train, remaining at a speed of 48 km/hr passes a tunnel in 21 sec. let's calculate the length of the tunnel. |
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Answer» Step-by-step explanation: T + B = 48× 5/18× 21 100 + B = 40/3× 21 100 + B = 280 B = 280 - 100 So it's LENGTH is B = 180. |
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