The radius of a sphere is doubled. Its volume becomes how many times the original volume?
Practice this question from Chapter Mock 11: Mensuration, with options and an explanation.
Question
The radius of a sphere is doubled. Its volume becomes how many times the original volume?
Option A
2 times
Option B
4 times
Option C
6 times
Option D — Correct answer
8 times
Correct choice.
Explanation
Volume depends on $r^3$, so doubling the radius multiplies the volume by $2^3=8$.