What is the surface area of this cylinder?

Use ​𝜋 ≈ 3.14 and round your answer to the nearest hundredth. 10ft 10ft

1 answer

To calculate the surface area \( A \) of a cylinder, you can use the formula:

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

where:

  • \( r \) is the radius of the cylinder,
  • \( h \) is the height of the cylinder.

In this case, you provided dimensions of 10 ft for both the height and the diameter. To find the radius, we divide the diameter by 2:

\[ r = \frac{10 \text{ ft}}{2} = 5 \text{ ft} \]

Now, we can plug the values into the surface area formula:

  1. Calculate \( h + r \): \[ h + r = 10 \text{ ft} + 5 \text{ ft} = 15 \text{ ft} \]

  2. Substitute \( r \) and \( h + r \) into the surface area formula: \[ A = 2 \pi r (h + r) = 2 \times 3.14 \times 5 \text{ ft} \times 15 \text{ ft} \]

  3. First, calculate \( 2 \times 3.14 \times 5 \): \[ 2 \times 3.14 = 6.28 \] \[ 6.28 \times 5 = 31.4 \]

  4. Now multiply by \( 15 \): \[ A = 31.4 \times 15 = 471 \]

Thus, the surface area of the cylinder is:

\[ A = 471 \text{ ft}^2 \]

Since the question asks to round to the nearest hundredth, the answer is:

\[ \text{Surface Area} \approx 471.00 \text{ ft}^2 \]

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