Question

A cylindrical plastic pipe’s length is 12 cm and it’s radius is 2.5 cm. To the nearest tenth, what is the volume of the pipe?

Answer 1

V = 235.6 cm³

Explanation:

the formula for the volume of a cylinder of radius r and length h is

V = πr²h.

Here, r = 2.5 cm and h = 12 cm, so the volume is:

V = π(2.5 cm)²(12 cm) = 75π cm³

To the nearest tenth, this volume would be V = 235.6 cm³

Answer 2

volume = 235.7 cm³

Explanation:

To find the volume of the cylindrical plastic pipe, we simply use the formula:

volume of a cylinder = π r ² h

where r is the radius , and h is the height

From the question above, radius r = 2.5cm h =12 cm and π is a constant which is always equal to
`(22)/(7)` unless specified otherwise.

Now all we need to do is to insert our values into the formula;

volume of a cylinder = π r ² h

volume of a cylinder =
`(22)/(7)` × 2.5² × 12

=
`(22)/(7)` × 6.25 × 12

=
`(1650)/(7)`

= 235.714

≈235.7 cm³ to the nearest tenth

Therefore the volume of the cylindrical plastic pipe is 235.7 cm³