The height of sand in a cylindrical-shaped can drops 3 inches when 1 cubic foot of sand is poured out. What is the diameter, in inches, of the cylinder?
Given,
1 cubic feet =12×12×12 = 1728 inch3
Culinder of volume decrease = πr2×3 inch
= πr2×3 inches3 = 1728 inches3
= πr2 = 
= 
= 
Diameter of cylinder = 2r = 2×
14