Find the surface area of a cylinder with a radius of 5 inches and a height of 10 inches. Use the approximation 3.14 for pi.(1 point)

Responses

471 square inches

314 square inches

345.4 square inches

471 inches

1 answer

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

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

where:

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

Given:

  • Radius \( r = 5 \) inches,
  • Height \( h = 10 \) inches.

Now, substituting the values into the formula:

\[ \text{Surface Area} = 2 \times 3.14 \times 5 \times (10 + 5) \]

First, calculate \( (10 + 5) \):

\[ 10 + 5 = 15 \]

Now substitute this back into the formula:

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

Calculating \( 2 \times 3.14 \):

\[ 2 \times 3.14 = 6.28 \]

Now, calculate \( 6.28 \times 5 \):

\[ 6.28 \times 5 = 31.4 \]

Finally, calculate \( 31.4 \times 15 \):

\[ 31.4 \times 15 = 471 \]

Thus, the surface area of the cylinder is:

\[ \text{Surface Area} = 471 \text{ square inches} \]

The answer is 471 square inches.