Question

Banu is 20 years older than Binu. I In five years Banu will be twice as old as Binu find their present ages.

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

Answer 2

Let Binu 's age be X .
Banu's age = X + 20
After 5 years
Binu age = X + 5
Banu age = X + 25
B.G.C
Banu age = 2 x Binu age
X + 25 = 2 ( X + 5 )
X + 25 = 2 X + 10
25 - 10 = 2X - X
X = 15
Binu's age = 15 years.
Banu's age = 15 + 20 = 35 years.
Hope this helps you.☺☺☺