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1. The ratio of the father's age to his son's age is 7:3. The product of their ages is 756. The ratio of their ages after 6 years will be :
- A. 2:1
- B. 2:1
- C. 2:1
- D. 2:1
Answer: Option A
Explanation:
Hints : Let their age be 7x and 3x
Now, 7x × 3x = 756
x2 = 756/7 × 3 = 36
x = 6
After 6 year the ratio would be = 7x + 6/3x + 6 = 7 × 6 + 6/3 × 6 + 6 = 2/1 = 2 : 1
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