The formula to calculate the surface area of a cylinder is:
Surface Area = 2 * π * r * h + 2 * π * r^2
Given that the circumference of the bowling ball is 18 inches, we can calculate the radius (r) using the formula for circumference:
Circumference = 2 * π * r
18 = 2 * π * r
r = 18 / (2 * π) ≈ 2.86 inches
Given that the height (h) of the bowling ball is equal to its diameter, which is twice the radius:
h = 2 * 2.86 ≈ 5.71 inches
Now we can plug these values into the surface area formula:
Surface Area = 2 * π * 2.86 * 5.71 + 2 * π * 2.86^2 ≈ 161.24 square inches
Therefore, Roy will need approximately 161 square inches of wrapping paper.
Roy decided to wrap a bowling ball as a present for his best friend. The bowling ball has a circumference of 18 inches. Assuming there is no overlap, how much wrapping paper will Roy need? Round to the nearest whole unit where necessary
1 answer