How much water must be mixed in 300 ml of sugar solution which contain 40% sugar by weight, such that it becomes a 30% sugar solution?
50 ml
80 ml
90 ml
100 ml
75 ml
300 ml 40 % sugar
= 120 ml sugar
30/100 ( 300+X) = 120
900 + 3X = 1200
3X = 100 ml