Question

Ratio of the present ages of prakash and daughter is 3:1 .after 5 yrs this ratio will change to 7:3 .find present ages

Answer 1

let the age of Prakash be 3x
let the age of daughter be x

3x + 5 / x + 5 = 7 / 3
3(3x+5) = 7(x+5)
9x+15 = 7x+35
2x = 20
x =10

daughter = 10 years
Prakash = 30 years