Question

Volume of a cylinder with height of 7 and a radius of 3

Answer 1

The volume of cylinder =197.82 units²

Explanation:

Formula:-

Volume of cylinder = πr²h

Where r - Radius of cylinder and

h - Height of cylinder

To find the volume of cylinder

Here r = 3 units and h = 7 units

Volume = πr²h

= 3.14 * 3² * 7

= 3.14 * 9 * 7

= 197.82 units²

Therefore the volume of cylinder =197.82 units²

Answer 2

The volume of the cylinder is 63π or 197.9 units³

Explanation:

* Lets revise how to find the volume of any cylinder

- The volume of the regular solid = area of the base × its height

- The cylinder has two circular bases

- The area of the circle = πr²

∴ The volume of the cylinder = πr² × its height

* Now lets take the dimensions of the cylinder from the problem

- The height of the cylinder is 7 units

- The radius of the cylinder is 3 units

∵ The volume of the cylinder = πr² × its height

∴ The volume = π × 3² × 7 = 63π = 197.9 units³

* The volume of the cylinder is 63π or 197.9 units³