After 10 years A will be twice the age of B before 10 years.and now if the difference is 9 years between them then what is the age of B after 10 years

Answer: 49a

Let the age of A now is X.

age of B=X-9.

Aft 10 yrs A’s age =x+10.

B4 10 yrs B’s age =x-19.

Given, Xx+10=2X-38

This gives X=48

A’s age 48 now. B’s age 39 now.

After 10 yrs B's age will be 49.