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What was their average speed?

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Naina and Eesha, track stars with superb hearing, ran as fast as they could to catch up to the ice cream truck in the next town over.
They averaged 6 kms per hour, then rested to enjoy their ice cream.
They averaged 4 kms per hour over the same distance on the way back.
Not counting the time they rested, What was their average speed?

posted Jun 12, 2020 by Maninder Bath

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