mixtures

4 litres are drawn from a barrel full of pure acetone. It is then filled with water. Then 6 litres of the mixture is drawn from the barrel and 6 litres of water added back to the barrel. If the ratio of quantity of acetone to quantity of water in the barrel is 1:2, then what was the volume of the barrel?

mixtures

In a liquid mixture 20% is water, and in another mixture there is water to the extent of 25%. These two mixtures are mixed in the ratio 5: 3. Find the percentage of water in the final mixture.

 

mixtures

There are two one-litre cans containing milk and water in the ratios 7: 3 and 8: 2respectively. The contents of the two cans are poured into a two litre can, and the mixture is sold at Rs. 50 per litre, thereby realising a profit of 12.5% on the returns. Find the cost price of a litre of milk if the cost of water is zero.

mixtures

A man mixes 5 litres of orange juice at Rs. 55 per litre,12 litres at Rs. 60 per litre and 13litres at Rs. 65 per litre. At what price per litre must he sell mixture so as to gain Rs. 260 on the whole?