A Practical Application of Heat Transfer...

This is the last item from my Heat Transfer problem set I just finished:

“An aluminum can having a volume of about 350cc contains beer at 1C. Using a lumped-capacity analysis, estimate the time required for the contents to warm to 15C when placed in a room at 20C with a convection coefficient of 15 W/(m^2 C). Assume beer has the same properties as water”

The answer? About 24 minutes, by my estimation. Probably less, actually. And definitely less if you're holding it.