Question

The present age of Arun's Father is three times that of Arun.After five years,sum of their ages would be 70 years . Find their present age

Answer 1

Step-by-step explanation:

let the present age of arun be x

so present age of Arun's father will be 3x

After five years.

Aruns age : x +5

Arun's father's age : 3x + 5

So according to the given condition:

(x +5) + (3x+5) = 70

3x²+5x + 15x + 25 = 70

3x². + 20x -45=0

Proceed by splitting the middle term.