Question

Leah has two congruent beach balls. The diameter of one ball is 20 inches. Which choice is the closest for the volume of the second ball?

A) 3721 in^3
B) 4187 in^3
C) 11164 in^3
D) 33493 in^3

Answer 1

Two congruent balls are two balls that are exactly the same. You thus need to find the volume of the first ball, and that is by default the volume of the second. The volume of a ball is 4/3 pi r^3, where r is the radius. In this case, the radius is 10 inches, so the volume would be B), 4187 in^3.