Question

Present age of a father compared to his is 7:1 after four years the ratio is 4:1 what is the son's present age

Answer 1

Answer:

let present age of father is 7x

let present age of son is 1x

after four years : father's age = 7x+4

sons age = x+4

7x+4/x+4 = 4/1

7x+4 = 4x+16

7x-4x= 16- 4

3x= 12

x= 4

so , sons present age is x , x=4

son present age is 4.