Question

A dispenser holds 5652 cm3 of liquid soap and is now full. The radius of the dispenser is 7.5 cm.

What is the difference between the height of the soap in the full dispenser and the height when 4239 cm3 of soap remains in the dispenser?
Use 3.14 to approximate pi.

cm

Answer 1

First calculate the difference in the 2 volumes
5652-4293

This is the volume of the 'empty space' - which is cylindrical ion shape

The dispenser is a cylinder of radius 7cm

So the empty space is a cylinder with the volume oyu calculated above, and a radius of 7

You can use that to calculate the height of the space

Answer 2

so subtract 5652-4293 which is 1359.. then what do i do?

Answer 3

@MrNood

Answer 4

@iGreen

Answer 5

so oyu have the volume of the space

so what is th height of the empty space if vol = 1359 and r =7?

vol - pi r^2 h