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20 September, 00:20

A model airplane flies 18 feet in 2 seconds. What is the airplanes speed in miles per hour?

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  1. 20 September, 00:37
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    6.1 miles per hour

    Step-by-step explanation:

    That is 9 feet per second.

    There are 3600 seconds in an hour.

    9 x 3600 is 32400

    That is 32400 feet in an hour.

    32400 feet is about 6.1 miles. (rounded)

    The airplanes speed is 6.1 miles per hour.
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