In 10 years, A will be twice as old as B was 10 years ago. If A is now 9 years older than B, the present age of B is
A 29
B 39
C 48
D 86
Correct Option - B ExplainationA+10 = 2(B-10) A=B+9 Solving the two equations, B+19=2B-20 B=39
