Question

20 POINTS!Find the surface area of the cylinder and round to the nearest tenth. (Use the

button on your calculator)
12 in.
in²
.7 in.
Area of the base: B =
Height of the cylinder: h=
Circumference of the base: P =
Surface Area = 2B + Ch (Plug in your values to get the surface area.) (View
answer)
in

Answer 1

835.7 in.²

Explanation:

surface area of cylinder = 2B + Ch,

where B = area of one base (a cylinder has 2 circular bases)

C = circumference of the base

h = height of the cylinder

B = πr²

B = π × (7 in.)²

B = π × 49 in.²

B = 49π in.²

h = 12 in.

C = 2πr

C = 2 × π × 7 in.

C = 14π in.

SA = 2B + Ch

SA = 2 × 49π in.² + 14π × 12 in.²

SA = 98π in.² + 168π in.²

SA = 266π in.²

Use the π button of the calculator, not 3.14 for π.

SA = 266 × 3.141592654 in.²

SA = 835.6636459 in.²

Answer: 835.7 in.²