Which of the following is a video format?

The correct answer is A

- The ratio of A and B present age is 7:3. The product of their ages is 8400. What will be the ratio of their ages after 4 years?
- At present, Peter is Seven years younger than Adam. Adam’s age twenty years hence will be equal to thrice that of peter Five years ago. What will be the sum of their present age?
- The ratio of age of A and his son is 9:2. If the difference of their ages 7 year ago is 21, then find the sum of ages of A and his son 13 year hence?
- The ratio of age of A and his son is 8:5. If the difference of their ages 8 year ago is 15, then find the sum of ages of A and his son 10 year hence.
- A is younger than B by 4 years. If the ratio of A and B ages is 5:7 respectively, then find the age of A.
- The respective ages of a mother and her daughter are 55 and 15 years. In how many years will the mother be thrice as old as her daughter?
- Present ages of P and Q are in the ratio 2:5 respectively. If Q’s age, 15 years hence from now will be 5 times of P’s age, 5 years ago from now, then find the present age of Q.
- The ratio of the ages of A, B and C, 5 years ago, was 4 : 5 : 7. The sum of their present ages is 135 years. What will be the sum of the ages (in years) of B and C, 3 years from now?
- The ratio of the present ages of father and his son is 7:3. The product of their ages 3 years ago was 32 times of his son’s age that year. What was son’s age 2 year ago?
- The ratio of age of A and his son is 10:3. If the difference of their ages 8 year ago is 28, then find the sum of ages of A and his son 12 year hence.

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