Contaminated Volume in a Tank Welcome! You are encouraged to register with the site and login (for free). When you register, you support the site and your question history is saved.In a water tank, of the volume is occupied by water and the remainder of the volume is occupied by air. If a contaminant occupies of the water, by volume, and 20 percent of the air, what percent of the volume of the water tank is contaminated? 25% 30% 32% 33% 34% Review Answer