Question

The circumference of tyler’s bike tire is 72 inches what is the diameter of the tire ?

Answer 1

72/ π

Explanation:

Circumference of the cirlce = 2 π r

72 = 2 π r

72/2π = r

36/π = r

Since diameter = 2r then diameter = 36/π x 2 = 72/ π

Answer 2

The diameter is
`(72)/(\pi)` inches

Explanation:

A bike tyre has the structure of a circle.

The circunference of a circle is given by the following formula:

`C = 2\pi r`

In which r is the radius of the circle. The diameter is twice the radius.

So the first step to solve this problem is finding the radius.

`72 = 2\pi r`

`r = (6)/(\pi)`

The diameter is twice the radius. So:

`d = 2r = (72)/(\pi)`

The diameter is
`(72)/(\pi)` inches