A tank contains 10,000 gallons of a solution that is 5 percent sodium chloride by volume. If 2500 gallons of water evaporate from the tank, the remaining solution will be approximaiely what percent sodium chloride?
সমাধান
সঠিক উত্তর: Option D
Original =10,000 ----> sodium chloride = 5% ie 500 New = 10,000-2,500 = 7500.
New % = (500/7500) * 100
= 6.67%
