## Essential University Physics: Volume 1 (4th Edition)

We multiply the density of the beer (which is equal to that of water) by the increase in height and by the cross-sectional area of the keg to obtain: $\Delta m = 1000 \times .012 \times \pi \times (.2^2)=1.51kg\approx 53 \ oz$ This is more than the amount that the person would need to be above the legal limit, so this is going to hurt their case.