The number of pounds of water in a persons body varies as the persons mass. A person with a mass of 90 pounds contains 60 pounds of water. How many pounds of water are in a person with a mass of 60 pounds?
Well since a person with a mass of 90 pounds contains 60 pounds of water it would be a 30-pound difference. So I'm guessing the person with a 60-pound mass would contain 30-pounds of water.
