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.

Answer 1

First we need to convert the diameter from inches to feet:

30 inches = 30/12 = 2.5 feet

Now we can calculate the radius:

radius = diameter/2 = 2.5/2 = 1.25 feet

Next, we can calculate the surface area of the cylinder:

Surface area = 2πr^2 + 2πrh

Surface area = 2*3.14*(1.25)^2 + 2*3.14*(1.25)*15

Surface area = 2*3.14*1.5625 + 2*3.14*18.75

Surface area = 9.425 + 117.75

Surface area = 127.175 feet^2

Therefore, the surface area of the cylinder is 127.175 square feet.