Question 9
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Ten years ago the ratio of the ages of X and Y was 1 : 2. Ten years from now it will be 3 : 4. How old is Y now?
- A 30 years Correct
- B 20 years
- C 40 years
- D 25 years
Correct Answer: Option A
y − 10 = 2(x − 10) → y = 2x − 10
4(x + 10) = 3(y + 10) = 3(2x)
4x + 40 = 6x → x = 20
y = 30
Answer: 30 years
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