A. 16 years
B. 18 years
C. 20 years
D. Cannot be determined
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Six years ago, the ratio of the ages of Usman and Rauf was 6 : 5. Four years hence, the ratio of their ages will be 11 : 10. What is Rauf’s age at present?
A. 16 years
B. 18 years
C. 20 years
D. Cannot be determined
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