Question

If the radius of a circle is 3.12 inches, what is the approximate area if you use 3.14 for and the area is rounded to the nearest tenth?

Answer 1

Volume of a Circle formula:
`V = (4)/(3) \pi r ^(3)`


`V = (4)/(3) \pi (3.12)^(3)`


`V = (4)/(3) \pi (30.371328)`


`V = (121.485312)/(3) \pi`


`V = 40.495104 * (3.14)`


`V = 127.15462656`

Round decimal to the nearest tenth:
127.1546256 ⇒ 127.2

Answer: V = 127.2 cubic inches