if the height is 15cm and the radius is 5cm

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

(1 point)
Responses

628 square centimeters
628 square centimeters

1,099 square centimeters
1,099 square centimeters

628 centimeters
628 centimeters

533.8 square centimeters

1 answer

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

\[ \text{Surface Area} = 2\pi r(h + r) \]

where:

  • \( r \) is the radius
  • \( h \) is the height

Given:

  • Height \( h = 15 \) cm
  • Radius \( r = 5 \) cm
  • \( \pi \approx 3.14 \)

Now, substitute the values into the formula:

\[ \text{Surface Area} = 2 \times 3.14 \times 5 \times (15 + 5) \]

First, calculate \( h + r \):

\[ h + r = 15 + 5 = 20 \]

Now, substitute that back into the surface area equation:

\[ \text{Surface Area} = 2 \times 3.14 \times 5 \times 20 \]

Calculate \( 2 \times 3.14 \):

\[ 2 \times 3.14 = 6.28 \]

Now multiply by \( 5 \):

\[ 6.28 \times 5 = 31.4 \]

Now multiply by \( 20 \):

\[ 31.4 \times 20 = 628 \]

Thus, the surface area of the cylinder is 628 square centimeters.

The correct response is: 628 square centimeters.