Question

The ages of rahul and hari are in the ratio of 5:7. four years later sum of their ages will be 56 years. what are their present ages?

Answer 1

age of rahul 5x
age of hari 7x
..
5x+4+7x+4 = 56
12x+8= 56
12x=56-8
12x=48
x=48/12 = 4
...
age of rahul = 5x = 5×4= 20 years
age of hari = 7x = 7×4= 28years

Answer 2

$\textbf{Answer:}$

Rahul's age=5x

Hari's age= 7x

Age of Rahul and Hari 4 years later:

Rahul: 5x+4

Hari: 7x+4

Sum of their ages= 56

=>5x+4+7x+4= 56

=>12x+8=56

=>12x=56-8

=>12x=48

$= > \: x = \frac{48}{12}$

=>x=4

Age of rahul=4x5=20

Age of hari=4x7=28

$\textbf{Hope it helps you!}$