Question

The sum of present age of Ravi and his father is 53 years four years ago fathers age was four times the age of Ravi find their present ages

Answer 1

let present age of ravi= x yrs
let presenr age of his father= y yrs

x+y = 53
x=53-y (1)

four yrs ago,
age of ravi= x-4 yrs
age of his father = y-4 yrs

4 (x-4) = (y-4)
4x-16=y-4
4x-12-y=0
4 (53-y)-12-y=0
212-4y-12-y=0
200-5y=0
200=5y
200/5=y
y=40
put value of y in eqn 1
x=53-40
x=13

present age of ravi is 13 yrs
present age of his father is 40 yrs