Question

Calculate the surface area of sphere if the circumference of great circle is 176 cm².​

Answer 1

9852 Rounded to the nearest whole number.

Explanation:

C = 2
`\pi`r Fill in what we know to solve for r

176 = 2
`\pi`r Divide both side by 2
`\pi`

r = 28 rounded to the nearest whole number.

The formula for the area of a circle is

A = 4
`\pi`
`r^(2)`

A = 4
`\pi`
`28^(2)`

A = 9852 Rounded to the nearest whole number