Question

Ron’s father’s age is presently four times his age. After five years, his father’s age will be 3 times his age. What was Ron’s age five years ago? Plz give ans with explanation.

Answer 1

Let Rohan's present age be x years.
the Rohan's father's age = 4x
After 5 years,
Rohan's age= x+5 
Rohan's father's age = 4x+5
but Rohan's father's age = 3times rohan's age after 5 years of his present age
=3(x+5)= 3x+15
now, 3x+15=4x+5
15-5=4x-3x
x= 10 years
therefore, Rohan's present age= 10 years
Rohan's father's present age= 10 x 4= 40 years
now, Rohan's age 5 years ago= 10-5= 5 years
Rohan's father's age 5 years ago= 40-5= 35 years.

Answer 2

Let Rons age be x
His fathers age is 4x
ATQ we have  4x+5= 3(x+5)
                     we have x=10
Ron's age five years ago= 10-5=5 years