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

Answer:

V = 235.6 cm³

Step-by-step 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

Answer:

volume = 235.7 cm³

Step-by-step 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 $\frac{22}{7}$  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  =  $\frac{22}{7}$  ×  2.5² × 12

                                     =    $\frac{22}{7}$  ×  6.25  × 12

                                      =  $\frac{1650}{7}$

                                      =  235.714

                                        ≈235.7 cm³  to the nearest tenth

Therefore the volume of the cylindrical plastic pipe is 235.7 cm³