Question

A bicycle wheel has a diameter of 28 inches. Which expression can be used to describe the circumference of the wheel as it relates to diameter?

Answer 1

Given:

The diameter of a bicycle wheel is 28 inches.

To find:

The circumference of the wheel as it relates to diameter.

Solution:

We have,

Diameter: $d=28\text{ inches}$

We know that,

Radius: $r=\dfrac{d}{2}$

$r=\dfrac{28}{2}\text{ inches}$

The circumference of a circle is

$C=2\pi r$

Putting $r=\dfrac{28}{2}$, we get

$C=2\times \pi \times \dfrac{28}{2}$

$C=28\times \pi$

Therefore, the correct option is (H).