Find the surface area for a cylinder with a height of 20 and a radius of 6. Use 3.14 for pi and round to the nearest whole number.
180 ft
720 ft
433 ft
135 ft
I thinks it is 720 ft.
2π(6^2+6*20) = 980
so, maybe you don't want the ends. Just the lateral area is
2π(6*20) = 754
???
To find the surface area of a cylinder, you need to calculate the sum of the areas of its curved surface (lateral surface area) and its two circular bases. The formula for the surface area of a cylinder is:
Surface Area = 2πrh + 2πr^2
Where:
- π is a mathematical constant approximated as 3.14.
- r represents the radius of the base of the cylinder.
- h represents the height of the cylinder.
Plug in the given values into the formula:
Surface Area = 2 * 3.14 * 6 * 20 + 2 * 3.14 * 6^2
Surface Area = 2 * 3.14 * 6 * 20 + 2 * 3.14 * 36
Surface Area = 2 * 3.14 * 120 + 2 * 3.14 * 36
Surface Area = 754.32 + 226.08
Surface Area = 980.4
Rounding to the nearest whole number, the surface area of the cylinder is 980 ft².
Therefore, your answer of 720 ft² is incorrect. The correct answer is 980 ft².