Question

A can of soup is in the shape of a cylinder. The diameter of the can is 8 centimeters, and the height is 10 centimeters. What is the surface area of the can, rounded to the nearest hundredth square centimeter? (Use 3.14 for π.)

351.68 cm 2
251.2 cm 2
502.4 cm 2
100.48 cm 2

Answer 1

what have you tried

Answer 2

I know that B is wrong

Answer 3

I'm using meter units (habit). Area of top is\[\pi r ^{2} = \pi (0.04)^2 = 0.00502654824574\]Area of bottom is the same.
\[0.00502654824574\]Area of the vertical component is\[height \times length = height \times 2 \pi r = 0.1 \times 2 \pi (0.04)=0.02513274122872\]Add them up gives \[0.0351858377202m^{2}\] or in units of CM squared (100x100) is
\[351.858377202cm^{2}\]