Question

Linear Equations
Exercise 2.2

Question 9: The ages of Rahul and Haroon are in the ratio 5:7. Four years later the sum of their ages will be 56 years. What are their present ages?

Answer 1

HELLO
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AGES OF RAHUL AND HARNOOR ARE IN RATIO 5:7 OR 5X AND 7X
5X+4+7X+4=56
12X+8=56
12X= 48
X= 4 
THE AGES ARE 20 AND 28

Answer 2

Hi ,

At present ,
_________

ratio of Rahul and Haroon ages = 5 : 7

let Rahul age = 5x years

Haroon age = 7x years

After 4 years
___________


Rahul age = ( 5x + 4 ) years

Haroon age = ( 7x + 4 ) years

according to the problem given,

sum of their ages = 56 years

5x + 4 + 7x + 4 = 56

12x + 8 = 56

12x = 56 - 8

12x = 48

x = 48 / 12

x = 4

Therefore ,

at present ,

Rahul age = 5x = 5 × 4 = 20 years

Haroon age = 7x = 7 × 4 = 28 years

I hope this helps you.

:)