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20 March, 12:58

A hiker walked 12.8 miles from 9:00 a. m. to noon. He walked an additional 17.2 miles from 1:00 p. m. to 6:00 p. m. What is his average rate for the entire walk, in miles per hour?

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  1. 20 March, 15:37
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    The average speed is the distance divided by the time.

    Total distance:

    12.8 miles + 17.2 miles = 30 miles

    Total time:

    noon - 9:00 a. m. = 3 hours

    6:00 p. m. - 1:00 p. m. = 5 hours

    Total time = 3 hours + 5 hours = 8 hours

    average speed = 30 miles / 8 hours = 3.75 miles per hour
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