15. A. A train travelling at a uniform speed for 360 km would have taken 48 minutes less to travel the same distance if its speed were 5 km/hour more. Find the original speed of the train.
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Speed of train = Distance / Time
=> 5 = 360 / 48
=> 5 = 7.5
=> The original speed of train is = 7.5 /5
=> 1.5 km/hour
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