In what ratio must water be mixed with milk to gain 40% by selling the mixture at the cost price of milk?
Answer & explanation
Correct answer: option 1
Let CP of milk be Re.1 per liter = SP of the mixture
Gain % = 30% So CP of mixture = Rs (10/13) per liter
let C = Rs. 0 /liter , D = Rs. 1 / liter and M = Rs.(10/14) / liter
Then the ratio of mixes is (D-M): (M-C