An orchard operator must dilute 11 quarts of a 60% insecticide solution by adding water. How many quarts of water should be added to get a mixture that is 2% insecticide?An orchard operator must dilute 11 quarts of a 60% insecticide solution by adding water. How many quarts of water should be added to get a mixture that is 2% insecticide?

Let "x" be the amount of water to be added..

(11+x)*0.02=11*0.6

x=(11*0.6-11*0.02)/0.02.

=319 litres.