Question

Approximately how many times as great is the volume of the grapefruit as the volume of the lime?
A. About 10 times as great.
B. About 4 times as great.
C. About 28 times as great.
D. About 8 times as great.

Answer 1

D

Answer 2

diameter is 2 times as great
volume is 2^3 times as great

Answer 3

The answer is D. Why? Look below.

Volume of Grapefruit = 4/3pi(5)^3 {Since diameter is 10, radius is 5}
Volume of Lime= 4/3pi(2.5)^3
So, 4/3pi get cancelled. We are left with
125/15.625=8 times. :)