A sphere has a surface area of 60 square feet. Which choice is the best approximation of its radius? Use 3.14 to approximate pi.

Question

asked May 7, 2018 67.9k views

2 Answers

Tad Harrison · Answer 1 · 2018-05-13T18:42:22+0000

Answer:

Radius is 2.18

Explanation:

We have been given the surface area of sphere 60 square feet

And formula for area of sphere is
$4{\pi}r^2$

using
${\pi}=3.14$

On substituting the values
$60=4\cdot 3.14\cdot r^2$ we get:

$60=4\cdot 3.14\cdot r^2$

On simplification we get:

4.77= r^2

√(4.77)= r

2.18= r