The present ages of A and B are in the ratio 5 : 7. Six years ago, their ages were in the ratio 2 : 3. What is B's present age (in years)?
A. 35
B. 48
C. 36
D. 42
A. 35
B. 48
C. 36
D. 42
Best answer
Answer: D. 42
Answer: (D) 42
Let ages be 5k and 7k. \( \frac{5k-6}{7k-6} = \frac{2}{3} \Rightarrow 15k - 18 = 14k - 12 \Rightarrow k = 6 \). B = 42 years.
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