5 years ago, average age of P and Q was 15 years. At present, average age of P, Q and R is 20 years. What will be the average age after 10 years ?

5 years ago, average age of P and Q was 15 years. At present, average

1.	5 years ago, average age of P and Q was 15 years. At present, average age of P, Q and R is 20 years. What will be the average age after 10 years ?
A.	35 years
B.	40 years
C.	30 years
D.	50 years
Answer» D. 50 years