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Let x liters of milk be replaced by water. Milk in the mixture after replacement = (40 × 5/8) - x = 25 - x. Water in the mixture after replacement = (40 × 3/8) + x = 15 + x. We want the new ratio of milk to water to be 1:1. So, 25 - x = 15 + x. Solving for x: 25 - 15 = 2x 10 = 2x x = 5 liters. Correct answer: a.
The respective ratio of the present ages of A and B is 7:6. The present age of C is 20% more than that of B. The sum of the present ages of A, B and C i...
There are three persons 'Amit', 'Bhuvan' and 'Cheetan' such that 7 times the present age of 'Amit' is equal to 9 times the present age of 'Bhuvan' while...
The sum of the ages of a father and his son is 50 years. After 10 years, the father will be four times as old as the son. What are their current ages?
The sum of the present ages of Tina and her father is 50 years. Tina's father is 4 years older than her mother, and two years ago, Tina's mother's age w...
A boy’s age is 125% of what it was 8 years ago, but 75% of what it will be after 8 years. What is his present age?
Nine years ago, the ratio of ages of Raj and Vijay was 5:7, respectively. Four years hence, the ratio of ages of Sanjay and Vijay will be 2:3, respectiv...
The current ages of 'A' and 'B' are in the ratio 4:7. Currently, 'B' is 8 years younger than what 'C' was 6 years ago. If 'C' is 42 years old now, what ...
Present age of ‘A’ is 30% more than that of ‘B’. If 8 years hence from now, ‘B’ will be 9 years younger than ‘A’, then find the sum of p...
The respective ratio of the present ages of A and B is 5:6. The present age of C is 20% more than that of B. The sum of the present ages of A, B and C i...