<PRE><B>Question 1043271</B>
A bike is traveling 10 mph.  Determine number of revolutions the wheels make in 1 min.

Diameter of wheels: 28 in.

My partial attempt:

Circumference of circle: pi * diameter.

3.1416 * 28 = 87.9648 = 88 in. = 7.33 ft.

In 1 revolution the wheels travel 7.33 ft.

7.33 / 5280 = .00138 mi.
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I would first convert 10 mi/hr to ft/minute
10 mi*5280 ft/mile/(1 hr*60 min/hr) = 880 ft/min
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Times 12 --&gt; 10560 inches/min
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The bike moves 10560 inches in a minute
Each revolution is 28*pi inches.
# of revs/min = 10560/(28pi) =~ 120 rpm

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