1.What ratio of water should be mixed with spirit to achieve a 20% profit when selling the mixture at the original cost price of the spirit?
2.A bucket contains 40 liters of milk priced at Rs. 3.50 per liter. How many liters of water should be added to reduce the price of milk to Rs. 2 per liter?
3.Vessels A and B contain milk and water in the ratios 4:3 and 2:3 respectively. In what proportion should the contents of these two vessels be combined to produce a mixture in vessel C with equal parts milk and water?