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)
314 square inches
471 inches
345.4 square inches
471 square inches

1 answer

The surface area \( S \) of a cylinder can be calculated using the formula:

\[ S = 2\pi r(h + r) \]

where:

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

Given:

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

Substituting these values into the formula:

\[ S = 2 \cdot 3.14 \cdot 5 \cdot (10 + 5) \] \[ S = 2 \cdot 3.14 \cdot 5 \cdot 15 \] \[ S = 2 \cdot 3.14 \cdot 75 \] \[ S = 6.28 \cdot 75 \] \[ S = 471 \text{ square inches} \]

Therefore, the surface area of the cylinder is 471 square inches.