Question

The volume of a cylinder is found by: V=πr2h

A cylinder has a radius of 4 cm and a height of 5 cm. Use 3.14 to approximate π
a. What is the volume of the cylinder?
b. What is the volume of the cylinder when its radius is tripled?
c. What is the volume of the cylinder when its radius is halved?

Answer 1

Explanation:

Part a:

V=
`\pi`
`4^(2)`(5)

=80
`\pi`

Part b:

V=
`\pi (12^(2) )(5)`

=720
`\pi`

radius trippled= 3(4)

Part c:

radius halved= 2cm

V=
`\pi (2^(2) )(5)`

=20
`\pi`