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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?
7 years ago

Answers

Reiny
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
7 years ago
sef ds
dsaf
4 years ago

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