You could be the lucky winner if you guess the correct answer to this question. Here are some clues:
"Styrofoam" (Expanded Polystyrene/EPS) is:
- 98% air
- 1/10th as dense as water (density ranges from 1.0 to 4.0 pcf)
While you work out the math, have a look at this great video of a styrofoam recycling machine!