Question

A 6cm section of plastic water pipe has inner diameter of 12cm and outer diameter of 15cm. find the volume of the plastic pipe not the hollow interior to the nearest hundredth

Answer 1

Answer:

The volume of the plastic pipe  is 141 cubic centimetre

Step-by-step explanation:

Given:

The Length of the plastic water pipe = 12 cm

The inner Diameter of the  plastic water pipe = 12 cm

The outer Diameter of the  plastic water pipe = 15 cm

To Find:

the volume of the plastic pipe not the hollow interior to the nearest hundredth = ?

Solution:

The volume of the plastic water pipe can be found by using the volume of the cylinder formula

The Volume of the cylinder  = $\pi r^2 h$

Where

r is the radius

h is the height

Radius r  $= \frac{diameter}{2} = \frac{15}{2} = 7.5 cm$

On substituting the values

The Volume of the cylinder  

= $\pi (7.5) (6)$

= $45 \pi$

=  141.37   cubic centimetre

= 141  cubic centimetre