a = 2πr(r+h)
v = 1/3 πr^2 h
Since v is directly proportional to r^2, reducing r by 1/3 will reduce v by 1/9:
π(1/3 r)^2 h = π(1/9 r^2)h = 1/9 πr^2h = 1/9 v
The radius of a cylinder is 3.5 ft. The height is 14 ft. Find the surface area and volume of the cylinder to the nearest tenth of a foot. SHOW YOUR WORK!
1 answer