Question
The ratio of age of A and B after 8 years is 4:5
respectively. The ratio of age of A and C 6 years ago is 3:4 respectively. If the present average age of A and C is 30 years, then find the present age of C.Solution
Let the age of A and B after 8 years be 4x years. and 5x years respectively. And the present age of C is ‘y’ years. So, (4x – 14)/ (y – 6) = 3/4 16x – 56 = 3y – 18 16x – 3y = 38……………. (1) And 4x – 8 + y = 60 y = 68 – 4x…………………. (2) From equations (1) and (2), we get. 16x – 204 + 12x = 38 28x = 242 x = 8.6 Present age of C = 62 -(4 ×8.6) = 27.6years
A mixture contains milk and water in the ratio of 3:2 respectively. If 34 litres of milk and 34 litres of water are added to this mixture, then respecti...
A vessel contains 80 liters of milk. A milkman removes 20 liters of milk and replaces it with water. He repeats the process two more times. What is the ...
Mixture ‘E’ of honey and water contains 60% honey. If a certain amount of mixture ‘E’ is taken out and poured into container ‘T’, and it con...
A tank contains 80 litres  of a mixture of milk and water in the ratio 3 : 1 . If 20 litres  of this mixture is removed and replaced with water,...
Quantity of water in a 280 litres mixture (alcohol + water) is 40 litres less than the quantity of alcohol in it. Find the quantity of water to be mixed...
A 250 litres mixture contains milk and water in the ratio 4:1 respectively. If 40% of the mixture is replaced with the same quantity of water, then find...
In a Mixture , the ratio of Milk and Water is 5 : 3. If 20 litre mixture drawn off and replace by 8 litre water then the ratio of Milk and Water become ...
110 litres of mixture contains water and milk in the ratio 2:5 respectively. If 26 litres of the mixture is replaced by same quantity of water, then fin...
- In mixture ‘M’, the ratio of milk to water is 6:5. In another mixture ‘N’, the ratio is 4:7. If 110 litres of ‘M’ and 77 litres of ‘N’ are ...
55% of the original 'a' liters of pure petrol is taken out from a container and replaced with 66 liters of Methanol, ensuring the total quantity of the ...
Relevant for Exams:
