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2 March, 12:34

Me. lopez drives 40 miles to her sister's house. her average speed is 20 miles per hour. on her way home her average speed is 40 miles per hour. what is her average speed for the round trip?

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  1. 2 March, 12:52
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    Total distance = 2 (40 miles) = 80 miles

    Total time = 40/20 + 40/40 = 2 + 1 = 3 hours

    Average speed = total distance/Total time = 80 miles/3 hours = 26.67 miles per hour.
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