Question

banu is 20 years older than binu.in 5 years banu will be twice as old as binu. find their present age

Answer 1

Let Present age of Binu = x
Therefore, Present age of Banu = x+20
After 5 years,
Age of Binu = x+5
Age of Banu = (x+20)+5
= x+25
According to question ,
x+25 = 2 (x+5)
x+25 = 2x + 10
25 = 2x+10 - x
25 = x+10
25 - 10 =x
15 = x
or x= 15


Hence Present age of Binu = 15 years

and Present age of BAnu = x+20
= 15 + 20
=35 Years