Q11 A grocer has two types of rice and their price are 38 Rs/kg and 26 Rs/kg. He want to make a new type of rice by mixing old types. In what ratio old types should be mixed so that the price of new type would be 30 Rs/kg.

Q12 A shopkeeper has 50 kg of rice. A part of which he sells at 10% profit and remaining at 5% loss. He gains 7% on the whole. Find the quantity sold at 10% profit.

Q13 A,B, and C are metals. A is 22 times as heavy as C and B is 3 times as heavy as C. In what ratio should A and B be mixed, so that the mixture is 13 times heavier than C?

Q14 Tea worth Rs. 126 per kg and Rs. 135 per kg are mixed with a third variety in the ratio 1 : 1 : 2. If the mixture is worth Rs. 153 per kg, the price of the third variety per kg will be:

Q15 A mixture of wine and water contains 80% wine. In 50 liters of such a mixture, how many liters of water are required to increase the percentage of water to 50%?

Q16 Two mixtures A and B has milk and water in the ratio 2 : 1 and 2 : 3 respectively. If A and B are mixed in the ratio 1:1 , what is the ratio of milk and water in the new mixture?

Q17 A dishonest milkman professes to sell his milk at cost price, but he mixes it with water and thereby gains 25%. Find the percentage of water in the mixture.

Q18 A mixture of 80 litres of wine and water contains wine and water in the ratio 3:1. How much wine should be added to make the ratio 4:1 in the resulting mixture?

Q19 A cask contains alcohol solution with concentration 18%. If 6 Liters of this mixture is taken out and replaced with water, then concentration drops to 15%. What is the original volume in the cask.

Q20 A vessel is filled with liquid, 3 parts of which are water and 5 parts syrup. How much of the mixture must be drawn off and replaced with water so that the mixture may be half water and half syrup?