A dishonest milkman wants to make a profit on the selling of milk. He would like to mix water (costing nothing) with milk costing Rs.33 per litre so as to make a profit of 20% on cost when he sells the resulting milk and water mixture for Rs.36 In what ratio should he mix the water and milk?
Choose the correct choice from the following answers.
A) 1:20 B) 1:10 C) 1:8 D) 1:4 E) 6:11
cost needed to net a 20% profit:   (36-x)/x = .2   x=30   actual cost:   33   solution (x=liters of water needed to be added to the 1liter of milk):   33/(1+x)=30   x = 1/10   so to get the cost down to 30   Milk:Water   1:1/10   or (10/10):(1/10)   ANSWER:1:10
<result>B</result>
A dishonest milkman wants to make a profit on the selling of milk. He would like to mix water (costing nothing) with milk costing Rs.33 per litre so as to make a profit of 20% on cost when he sells the resulting milk and water mixture for Rs.36 In what ratio should he mix the water and milk?