Five years ago, the average age of P and Q was 15 years. The present average age of P, Q, and R is 20 years. What will R's age be after ten years?
A
32 years
B
25 years
C
35 years
D
30 years
Correct Option:
D
Explanation
Five years ago, the total age of P and Q was 15 × 2 = 30 years. Their present total is 40 years. The present total age of P, Q, and R is 20 × 3 = 60 years, so R is now 20 years old. After ten years, R will be 30 years old.
