Question

Find the surface area of a sphere with a diameter 10 cm.

a.
768 sq. cm
c.
314 sq. cm
b.
546 sq. cm
d.
154 sq.cm


Please select the best answer from the choices provided

A
B
C
D

Answer 1

c.

314 sq. cm

Explanation:

Surface area of sphere:

The surface area of an sphere with radius r is given by:

`S = 4\pi r^2`

Find the surface area of a sphere with a diameter 10 cm.

Radius is half the diameter, so
`r = (10)/(2) = 5`

The surface area is:

`S = 4\pi*5^2 = 100\pi = 314`

314 square centimeters, and option c is the answer.