Question

I want to cover the curved surface of a cylinder with orange paper. My cylinder is 14” tall. The diameter is 3.5”. I have listed the sizes of paper I have available. Which sheet of paper will cover the cylinder without overlapping?

A. 5”x14”

B. 1K4”x20”

C. 14”x30”

D. 11”x14”

Now I want to cover the lid and bottom of the cylinder with blank paper. I need to know the total area of the bases. What is the area of the bases rounded to the nearest inch ?

A 19”

B. 4”

C. 38”

D. 10”

Answer 1

circumference of the cylinder = 3.14 x 3.5 = 10.99 = 11 inches
so D. 11 x 14 is correct for the first part

area of the top = PI x r^2 = 3.14 x 1.75^2 = 9.62 inches

top and bottom = 9.62 x 2 = 19.23 = A. 19 inches