a tank contains 10,000 gallons of a solution that is 5 percent sodium chloride by volume . if 2,500 gallons of water evaporate from the tank , the remaining solution will be approximately what percent sodium chloride ?
"10000 gallons solution has 500 gallons sodium chloride 9500 gallons water = > 2500 gallons water evaporates = > 7000 gallons water remains hence , concentration of sodium chloride is 500 / 7500 = 6.67 % answer : d"
multiply(divide(multiply(multiply(const_100, const_100), divide(5, const_100)), subtract(multiply(const_100, const_100), add(multiply(add(const_2, const_3), multiply(multiply(add(const_2, const_3), const_2), const_100)), multiply(add(const_2, const_3), const_100)))), const_100)