Question

Surface area of cylinder using 3.14 with height of 40 and radius of 25

Answer 1

To calculate 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, and
- \( \pi \) is approximately 3.14.

Given:
- Height \( h = 40 \)
- Radius \( r = 25 \)

Now, substituting the values into the formula:

\[
\text{Surface Area} = 2 \times 3.14 \times 25 \times (40 + 25)
\]

Calculating the expression inside the parentheses:

\[
40 + 25 = 65
\]

Now substitute it back into the formula:

\[
\text{Surface Area} = 2 \times 3.14 \times 25 \times 65
\]

Now calculate:

1. \( 2 \times 3.14 = 6.28 \)
2. \( 25 \times 65 = 1625 \)
3. \( 6.28 \times 1625 = 10283.75 \)

Thus, the total surface area of the cylinder is:

\[
\text{Surface Area} \approx 10283.75 \text{ square units}
\]