You can put this solution on YOUR website!
a length has unit such as cm or inch or km or mile or yard or meter.
An area is 2 lengths multiplied together, producing a 2-D space... their units echo this multiplication and an area is quoted as cm^2 or inch^2 or km^2 etc
A volume is 3 lengths multiplied together, producing a 3-D space... their units, again, exho this, so that a volume would have units of cm^3 or inch^3 or km^3 etc.
the can is a regular shape...a cylinder. The volume of ANY regulat shape is given by the formula (cross-sectional area)*(length)
Now a cylinder (... the can) has a cross-section of a circle, whose are is
where r is the radius.
so the volume of the can =
So, put the values in, from the question
...the diameter is 8cm, so the radius is 4cm
work this out on your calculator. Whatever your answer, you have just calculated a volume, whose 3 "lengths" were all cm, so its unit is