geometery
posted by Anonymous .
A solid metal cylinder with a 4in. radius and a 10in. altitude is melted and recast into solid right circular cones each with a 1in. radius and a 2in. altitude. The number of cones formed is

vol of cyl = πr^2h = 160π
vol of cone = π/3r^2h = 2π/3
160π / (2π/3) = 240 cones 
4^2*pi*10/1^2*pi*2 = 80