Question

If the surface area of a sphere is 36π cm², then the radius of the sphere is:

• A. 3 cm
• B. 5 cm
• C. 2 cm
• D. 4 cm

Answer 1

Answer:

A. 3 cm

surface area of sphere$=4\pi r^2$

$4\pi r^2=36\pi$

$\pi r^2=9\pi$

$r^2=9$

$r=3$