Practice MCQ Questions and Answer on Alligation
31.
In 2 kg mixture of copper and aluminium, 30% is copper. How much aluminium powder should be added to the mixture so that the quantity of copper becomes 20% ?
- (A) 900 gms
- (B) 800 gms
- (C) 1000 gms
- (D) 1200 gms
32.
The ratio of spirit and water in two mixtures of 20 litres and 36 litres is 3 : 7 and 7 : 5 respectively. Both the mixtures are mixed together. Now the ratio of the spirit and water in the new mixture is ?
- (A) 25 : 29
- (B) 9 : 10
- (C) 27 : 29
- (D) 27 : 31
33.
Three containers whose volumes are in the ratio of 2 : 3 : 4 are full of mixture of spirit and water. In the 1st container the ratio of spirits and water is 4 : 1, in 2nd container the ratio is 11 : 4 and on the 3rd container ratio is 7 : 3. All the three mixtures are mixed in a big container. The ratio of spirit and water in the resultant mixture is ?
- (A) 4 : 9
- (B) 9 : 5
- (C) 11 : 4
- (D) 5 : 10
34.
8 litres are drawn from a cask full of wine and is then filled with water. This operation is performed three more times. The ratio of the quantity of wine now left in cask to that of water is 16 : 65. How much wine did the cask hold originally?
- (A) 18 litres
- (B) 24 litres
- (C) 32 litres
- (D) 42 litres
35.
In what ratio should sugar costing Rs. 40 per kg he mixed with sugar costing Rs. 18 per kg. So as to earn a profit of 20% by selling the mixture at Rs. 54 per kg?
- (A) 3 : 5
- (B) 4 : 7
- (C) 5 : 8
- (D) 2 : 3
36.
A mixture contains alcohol and water in the ratio 4 : 3. If 5 litres of water is added to the mixture, the ratio becomes 4 : 5. The quantity of alcohol in the given mixture is -
- (A) 3 litres
- (B) 4 litres
- (C) 15 litres
- (D) 10 litres
37.
A can contains a mixture of two liquids A and B is the ratio 7 : 5. When 9 litres of mixture are drawn off and the can is filled with B, the ratio of A and B becomes 7 : 9. How many litres of liquid A was contained by the can initially?
- (A) 10
- (B) 20
- (C) 21
- (D) 25
38.
If X beakers of 100 ml containing 1 : 4 acid-water solution are mixed with Y beakers of 200 ml containing 3 : 17 acid-water solution then the ratio of acid to water in the resulting mixture becomes 19 : 91. Find X : Y.
- (A) 5 : 3
- (B) 3 : 5
- (C) 7 : 13
- (D) 13 : 7
39.
A vessel contains milk and water in the ratio 3 : 2. The volume of the contents is increased by 50% by adding water to it. From this resultant solution 30 L is withdrawn and then replaced with water. The resultant ratio of milk water in the final solution is 3 : 7. Find the original volume of the solution.
- (A) 80 L
- (B) 65 L
- (C) 75 L
- (D) 82 L
40.
Two types of tea costing Rs. 180/kg and Rs. 280/kg. In what ratio should these be mixed so that obtained mixture sold at Rs. 320/kg to earn a profit of 20% is ?
- (A) 3 : 13
- (B) 4 : 13
- (C) 1 : 13
- (D) 2 : 13