railway RPF Constable Mock Test Series 2024 Quantitative Aptitude Ratio and Proportion Age

One year ago, the ratio of the ages of A and B was 4 : 3. The ratio of their ages, after 7 years from now, will be 9 : 7. What is the present age (in years) of B?

1
49
2
52
3
51
4
48
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