Not sure how to approach this question. If i filled a 4.5 litre bottle with pennys how much would be in there.
Any help appreciated?
You'd need to find the volume of a penny which is $\displaystyle V = \frac{\pi D^2h}{4}$
where
- V = Volume
- D = Diameter
- h = thickness
Once you know the volume of a penny you can do
$\displaystyle n = \frac{4.5 \times 10^6}{V}$
to get the number of pennies (n). That formula only works for measuring the penny's thickness and diameter/radius in mm
Bear in mind this will be an overestimate because it does not account for gaps between the pennies.