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11 November, 12:33

Starting at home, Omar traveled uphill to the gift store for 30 minutes at just 10 mph. He then traveled back home along the same path downhill at a speed of 30 mph. What is his average speed for the entire trip from home to the gift store and back?

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  1. 11 November, 12:56
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    Single journey = 0.5*10 = 5 miles

    goung back time = 5 / 30 = 1/6 of an hour

    average

    speed foe whole journey = 10 / (1/2 + 1/6) = 10 * 3 / 2 = 15 mph
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