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14 February, 15:20

Aidan drives to school and back each day. The school is 16 miles from his home. He averages 40 miles per hour on his way to school. If his total trip takes 1 hour, at approximately what average speed does Aidan drive home?

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  1. 14 February, 15:35
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    26 2/3 mph

    Step-by-step explanation:

    time = distance/speed

    speed = distance/time

    Use the first of these relations to find Aidan's time getting to school:

    time = 16 mi / (40 mi/h) = 16/40 h = 0.4 h

    Then the time Aidan takes to get home is 0.6 hours, and his average speed for that trip home is ...

    speed = 16 mi / (0.6 h) = 26 2/3 mi/h
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