Question

The diameter of a tennis ball is 68 mm. find its surface area. express your answer in terms of π.

Answer 1

surface area = 4πr²

you have the diameter, you find r with diameter :2

4π (68:2)²=

4π34²=

4π1156=

4624π

Answer 2

Surface area of tennis ball : 4624 π mm².

Explanation:

Given : The diameter of a tennis ball is 68 mm.

To find : find its surface area. express your answer in terms of π.

Solution : We have given that diameter of a tennis ball is 68 mm.

Radius :
`(Diameter)/(2)`

Radius =
`(68)/(2)`.

Radius = 34 mm .

Surface area of sphere : 4 * π *
`radius^(2)`.

Surface area of tennis ball : 4 * π *
`radius^(2)`.

Surface area of tennis ball : 4 * π *
`(34)^(2)`.

Surface area of tennis ball : 4624 π mm².

Therefore, Surface area of tennis ball : 4624 π mm².