Question

HELP PLEASE ANSWER THIS CORRECTLY

Which equation would calculate the amount of wrapping paper, in square centimeters, needed to completely cover the cylinder shown?
a cylinder with the diameter labeled 2.8 centimeters and the height labeled 3.7 centimeters

SA = 2π(1.4)2 + 2.8π(3.7)
SA = 2π(1.4)2 + 1.4π(3.7)
SA = 2π(2.8)2 + 2.8π(3.7)
SA = 2π(2.8)2 + 1.4π(3.7)

Answer 1

2π(1.4)2 + 2.8π(3.7)

Explanation:

A cylinder's surface is a rectangle and 2 circles

the circumference is 2.8pi, which is also the side length of the rectangle, so the surface area of the rectangle is 2.8pi*3.7

The area of the circle is simply pi*(1.4)^2, and there are 2 circles.

So the answer is 2π(1.4)2 + 2.8π(3.7)