21). 4 L are drawn from a container full of milk and then is filled with water. This operation is performed three more times. The ratio of the quantity of milk left in the container and that of water is 16:65. How much milk did the container hold initially?
| A). 24 L |
| B). 12 L |
| C). 15 L |
| D). 25 L |
|
22). A container is filled with liquid, 6 part of which are water and 10 part milk. How much of the mixture must be drawn off and replaced with water so that the mixture may be half water and half milk?
| A). \( \Large \frac{1}{3} \) |
| B). \( \Large \frac{1}{7} \) |
| C). \( \Large \frac{1}{5} \) |
| D). \( \Large \frac{1}{8} \) |
|
23). A container contains a mixture of two liquids A and B in the ratio of 7 : 5. When 9 L of mixture is drawn off and the container is filled with B, the ratio of A and B becomes 7 : 9. How many litres of liquid A was contained by the container initially?
| A). 10 |
| B). 20 |
| C). 21 |
| D). 25 |
|
24). 60 kg of a certain variety of rice at Rs.32 per kg is mixed with 48 kg of another variety of rice and the mixture is sold at the average price of Rs.28 per kg. If there be no profit or loss due to the new sale price, then the price of the second variety of rice is
| A). Rs.25.60 per kg |
| B). Rs.25 per kg |
| C). Rs.23 per kg |
| D). Rs.30 per kg |
|
25). In what ratio must a mixture of 20% alcohol be mixed with another mixture of 50% alcohol so that the resultant mixture contains 40% alcohol?
| A). 3:5 |
| B). 2:6 |
| C). 1:2 |
| D). 3:7 |
|
26). 10 litres of 100% pure Methyl alcohol is added to a 5 litre solution containing 40% Methyl alcohol. What is the strength of Methyl alcohol in the resultant mixture?
| A). 60% |
| B). 70% |
| C). 50% |
| D). 80% |
|
27). A money lender lends a total of Rs.1000 to two of his customers on Monday. To one of them he charges interest at the rate of 10% p.a. and to the other he charges interest at the rate of 15% p.a. If the average rate of interest earned from the two customers is11.5% p.a.. then how much did he lend to the customer who pays him interest at the rate of 15% p.a.?
| A). Rs.200 |
| B). Rs.400 |
| C). Rs.100 |
| D). Rs.300 |
|
28). How many kilograms of salt at Rs.50 / Kg must be mixed with 40 Kgs. of salt that costs Rs.35 / Kg so that a merchant will get 20% by selling the mixture at Rs.48 / Kg?
| A). 30 Kgs. |
| B). 25 Kgs. |
| C). 20 Kgs. |
| D). 15 Kgs. |
|
29). A mixture of 50 liters of milk and water containing 20% water is further diluted with water so that the mixture has 30% water in it. How many liters of water are to be added?
| A). 9.28 |
| B). 7.14 |
| C). 3.35 |
| D). 6.42 |
|
30). Two liquids are mixed in the ratio 3 : 2 and the mixture is sold at Rs.11 per liter at a profit of 10%. If the first liquid costs Rs.2 per liter more than the second one, what are the costs of the two liquids?
| A). Rs.12.40 & Rs.10.40 |
| B). Rs.16.80 & Rs.14.80 |
| C). Rs.10.80 & Rs.8.80 |
| D). Rs.9.70 & Rs.7.70 |
|
\)