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Trevor covered a cylindrical can with paper for a project The can is 18 centimeters tall and has a 5 centimeter radius Which is closest to the minimum amount of paper Trevor needed to cover the enti?
Wiki User
∙ 11y ago
You're finding the surface area of a cylinder. The formula is SA=2(pi r2)+(2 pi r)h
pi r2 is the surface area of a circle. You need two of these, one for the top and one for the bottom of the can. Thus, 2(pi r2).
2(pi 42)= 2(16pi)=32pi
Next, you need the surface area of the body of the can. First, you need the perimeter of the can. perimeter=2 pi r. then you multiply that by the height of the can. SA of the body of the can=(2 pi r)h
(2 pi 4)14=(8pi)14=112pi
Finally, you add the two answers together to get the total surface area of the can.
32pi+112pi=144pi=351.858 cm2
Wiki User
∙ 15y ago
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