The total age of father and son at present is 74 years. 10 years ago the ratio of their ages was 7:2. What will be the ratio of their ages after 10 years?
A. 2: 2
B. 31: 16
C. 12: 16
D. 8:11
E. 19: 17
সঠিক উত্তরঃ
B.
31: 16
Explanation:
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