Prealgebra (7th Edition)

$A=2000\pi$ square centimeters $A\approx 3.14\times 2000= 6280$ $V=20000\pi$ cubic centimeters. $V\approx 3.14\times 20000=62800$
This solid is a cylinder and its volume can be calculated as: $V=\pi r^2 h$ where r is the radius, and h is the height. Here: $V=\pi\times 20^2\times50=20000\pi$ cubic centimeters. $V\approx 3.14\times 20000=62800$ The surface of a cylinder can be calculated as: $A=2\pi rh$ Here: $A=2\pi \times20\times 50=2000\pi$ square centimeters $A\approx 3.14\times 2000= 6280$