Alligation or Mixture, General Mathematics

Question: A mixture of 20 kg of spirit and water contains 10% water. How much water must be added to this mixture to raise the percentage of water to 25% ?
A
4 kg

B
5 kg

C
8 kg

D
30 kg

Note: Not available
1. Report
Question: A container contains 40 kg of milk. Form this container 4 kg of milk was taken out and replaced by water. This process was repeated further two times. How much milk is now contained by the container ?
A
27.36 kg

B
29.16 kg

C
28 kg

D
26.34 kg

Note: Not available
1. Report
Question: A can contains a mixture of two liquids A and B in the ratio 7 : 5. When 9 litres of mixture are drawn off and can is filled with B, the ratio of A and B becomes 7 : 9. How many litres of liquid A was contained by the initially ?
A
25

B
21

C
20

D
10

Note: Not available
1. Report

Question: A mixture of 20 kg of spirit and water contains 10% water. How much water must be added to this mixture to raise the percentage of water to 25% ?