Question

What is the radius of a circle with an area of 78.5 cubic inches? Use 3.14 for pi. Enter your answer in the box.

Answer 1

5 inches

Explanation:

The formula for area of a circle is
`A=\pi r^2`

Where

• A is area, and
• r is radius

We know area is 78.5, and we use 3.14 for
`\pi` and solve for r (radius):

`A=\pi r^2\\78.5=(3.14)r^2\\(78.5)/(3.14)=r^2\\25=r^2\\r=√(25)\\ r=5`

The radius is 5 inches.