Sonia cut a tree trunk in the shape of a cylinder. The length is 15 feet, and the diameter is 30 inches. Solve for the surface area, using 3.14 for π .
First, convert the diameter from inches to feet:
30 inches = 30/12 = 2.5 feet
Now, calculate the radius:
Radius = diameter/2 = 2.5/2 = 1.25 feet
Next, calculate the surface area of the cylinder:
Surface area = 2πr(r + h)
Surface area = 2 * 3.14 * 1.25(1.25 + 15)
Surface area = 2 * 3.14 * 1.25(16.25)
Surface area = 2 * 3.14 * 20.3125
Surface area = 127.63375 square feet
Therefore, the surface area of the cylinder is approximately 127.63 square feet.