original radius and height : r and h
volume = π r^2 h
new radius = 3r
new height = h/2
new volume = π (3r)^2 (h/2)
= (9/2) π r^2 h
ratio of old volume to new volume
= πr^2 h : (9/2) π r^2 h
= 1 : 9/2
= 2 : 9
If the radius of a right circular cylinder is tripled and its altitude is cut in half, then the ratio of the volume of the original cylinder to the volume of the altered cylinder is?
2 answers
dsaf