Five years ago, the average age of P and Q was 15 years. The average of the present ages of P, Q and R is 20 years. What will R's age be after 10 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, so their present total age is 40 years. The present total age of P, Q and R is 20 × 3 = 60 years, so R is currently 20 years old. After 10 years, R will be 30 years old.
