The wheels on Elliot's truck each have a circumference of 22 inches. What is the radius of each wheel?

1 Answer
Jul 4, 2016

≈ 3.5 inches

Explanation:

The circumference (C) of a circle is #color(red)(|bar(ul(color(white)(a/a)color(black)(C=2pir)color(white)(a/a)|)))#
where r is the radius of the circle.

To find r we can solve the above equation by rearranging it.

#rArr2pir=C#

divide both sides by #2pi#

#(cancel(2pi)^1 r)/cancel(2pi)^1=C/(2pi)rArrr=C/(2pi)#

Substitute C = 22

#rArrr=22/(2pi)≈3.5" inches to 1 decimal place"#