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10 May, 01:10

A truck with 36-in.-diameter wheels is traveling at 55 mi/h.

How many revolutions per minute do the wheels make?

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  1. 10 May, 01:18
    0
    The wheels make 512 revolutions per minute

    Step-by-step explanation:

    Diameter of truck = 36 in

    Speed = 55 mi/h

    Revolutions per minute = ?

    Radius r = diameter / 2

    r = 36/2

    r = 18 inches

    Speed = 55 mi/h

    1 mile = 63360 inches

    55 miles = 55*63360 inches

    55 miles = 3484800 inches

    1 hr = 60 minutes

    Speed = 3484800 inches/60 minutes

    Speed = 58,080 inches/min

    The formula used to calculate the revolutions per minute is:

    revolutions = speed/Circumference

    revolutions = 58,080 / 2*3.14*18

    revolutions = 58,080 / 113.4

    revolutions = 512.16

    revolutions = 512 revolutions per minute

    So, The wheels make 512 revolutions per minute
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