Question

PLEASEEEEEE HELPPPPP Which of the following is the surface area of the right cylinder below?

Answer 1

The correct answer is D. $72 \pi$ $units^{2}$

Explanation:

The surface area refers to the sum of the area of all sides in a 3D shape such as a cube or cylinder. Additionally, the formula used to calculate the surface area varies with the shape. In the case of cylinders, the general formula is $A = 2\pi r h + 2\pi r^{2}$. Moreover in this, the r represents the radius (measure from the center of a circle to any side), while the h represents height. Below, all the process is shown:

$A = 2\pi r h + 2\pi r^{2}$

$A = 2\pi (8 x 3) + 2\pi 8^{2}$

$A = 2\pi 24 + 2\pi 64$

$A = 48\pi + 128\pi$

$A = 176\pi$

In this point, you have the answer without solving $\pi$ (3.1416). This makes option A the correct answer.