Question

a mother is three times as old as her son .after 15 years ,she will be twice as old as her son what is the present age of mother

Answer 1

Step-by-step explanation:

ratio of mother and son at present is

3:1=2

after 15yrs ratio=. 2:1=1

cross multiply,

3:1

4:2

1R increase of mother due to 15yrs.

so, 1R=15

mother's present age=15×3=45yrs