multiply length by height. multiply the length by the height, and then double the product. work out 10 x 10 results = 100 square inches, then work out 100 x 2 = 200. the answer is 200 square inches.
the formula for the volume of a cylinder of radius r and height h is
v = πr²h.
here, that volume is v = π(8)²(3), which comes out to approx. 603.19 units³, or 192π units³ (answer d)