Surface Area of Cylinders Quick Check

3 of 53 of 5 Items

Question
Use the image to answer the question.

A cylinder is labeled with a height of 3 yards and a radius of 2 yards.



Find the surface area of the cylinder. Use the approximation of 3.14 for pi.

(1 point)
Responses

32.97
32.97

75.36
75.36

25.12
25.12

62.8
62.8
Skip to navigation

1 answer

To find the surface area of a cylinder, you can use the formula:

\[ \text{Surface Area} = 2\pi r^2 + 2\pi rh \]

where:

  • \( r \) is the radius,
  • \( h \) is the height, and
  • \( \pi \) is approximately 3.14.

Given:

  • Height (\( h \)) = 3 yards
  • Radius (\( r \)) = 2 yards
  • \( \pi \approx 3.14 \)

Now, calculate the surface area:

  1. Calculate the area of the top and bottom circles: \[ 2\pi r^2 = 2 \times 3.14 \times (2)^2 = 2 \times 3.14 \times 4 = 25.12 \text{ square yards} \]

  2. Calculate the area of the side (lateral surface area): \[ 2\pi rh = 2 \times 3.14 \times 2 \times 3 = 2 \times 3.14 \times 6 = 37.68 \text{ square yards} \]

  3. Add both areas together to find the total surface area: \[ \text{Surface Area} = 25.12 + 37.68 = 62.80 \text{ square yards} \]

Thus, the surface area of the cylinder is 62.8 square yards.

So the correct answer is 62.8.