Mathematics for IGCSE & O level - Mensuration (Section 8 - No. 44)
If the radius of a sphere is halved, how does its volume change?
It is halved.
It is quartered.
It is reduced by a factor of 8.
It is doubled.
설명
The volume of the sphere = 4/3πr³. When the radius is halved, the volume becomes (4/3)π(r/2)³ = 1/8 * (4/3πr³).