Question

20. The ages of Somal and Manoj are in
be 9 :7. Find their present ages
21. Five years ago a man was seven times as old as his son. The years bence, the father
three mes as old as his son. Find their present ages.
hemes as old as he was 4 years ago. Find his present a​

Answer 1

Step-by-step explanation:

Given the ratio of present ages of Sonal and Manoj=7:5

Let the age of Sonal be 7x years and age of Manoj be 5x years

10 years later their age will (7x+10) and (5x+10)

Given ratio of ages after 10 years=9:7

So now assume the ages be 9x and 7x

∴7x+10+5x+10=9x+7x

9x−5x=20

4x=20

x=5

So, the present age of Sonal=7x=7×5=35years

and the present age of Sonal=5x=5×5=25years