Please solve the question given in the description

X - Age of A, Y - Age of B

X + Y = 50

When A were as old as B, means when A was Y years old, so at that time, B were,

Y - (X-Y) years old.

Now,

Y = 2(Y - (X-Y))

Y = 3X/2

Hence,

Y + 3Y/2 = 50

Y = 20

Present age of B is 20 years,

Regards,

Team,

TopperLearning.