Question

What is the volume of a cylinder with base radius 2 and height 9?

Answer 1

Answer:

18

Step-by-step explanation:

volume= r × h = 2 × 9= 18

Answer 2

Answer:

The volume is 144$\pi$.

Step-by-step explanation:

In order to calculate the volume of a cylinder, you have to find the area of it's base. Because a cylinder's base is a circle, you use the formula A=$\pi r{2}$. Substituting in the radius's length would be A=$\pi (4){2}$, which is A=16$\pi$. Now that we know the base area of the cylinder, we multiply it by the height, which is 9 to calculate the volume. Therefore, the volume of the cylinder would be 9×16$\pi$, which is 144$\pi$.