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Answer : 1 72 km Explanation : Answer: A) 72 km Explanation: Rate of her upstream = 12/2.5 = 4.8 km/hrThen, ATQRate of downstream = 4.8 x 3 = 14.4 km/hr Hence, the distance she covers downstream in 5 hrs = 14.4 x 5 = 72 kms.

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