If train, 75% of its usual speed, crosses the platform which is in the length of 450 m, in 18 seconds and train crosses the pole with its usual speed in 12sec. what is the time taken by the train to cross tunnel which is in the length of 500m at a speed of 18kmph?
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I don't understand the question sorry
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this is what i got
time taken to cross 500m tunnel at a 18km/hr speed = 280seconds
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