Question

Find the surface area of a cylinder with radius 25 and height 7the options are 1250 pi, 2500 pi, 350 pi, 1600 pi

Answer 1

$\text{surface area of the cylinder = 1600}\pi$Explanation:

Given:

radius = 25

height = 7

The surface area of cylinder is given as:

$S\mathrm{}A\text{ = 2}\pi rh\text{ + 2}\pi r^{2}$$\begin{gathered} \text{surface area = 2}\pi(rh+r^2) \\ \text{surface area = 2}\pi((25\times7)\text{ + (25}\times25)) \\ \text{surface area = 2}\pi(175\text{ + 625)} \\ \end{gathered}$$\begin{gathered} \text{surface area = 2}\pi(800) \\ \text{surface area of the cylinder = 1600}\pi \end{gathered}$