Question

mr arjun is 5 times as old as his daughter six year later he will be three time as old as his daughter find the present age of mr arjun

Answer 1

Let Mr Arjun's age be 'x' and
      her daughter's age be 'y'.
PRESENT:
Mr Arjun is 5 times as old as his daughter.
∴ x = 5y → 1
FUTURE:
Six years later, he'll be 3 times as old as his daughter.
 ∴ x+6 = 3(y+6)
    x+6 = 3y+18
    x-3y= 18-6
    x-3y=12
Substituting this in 1, we get:
  5y-3y=12
       2y=12
         y=12÷2
      ∴ y=6
From 1,
         x=5y
           =5(6)=30
∴Mr Arjun's present age is 30.