Question

The present age of hari and hary are in the ratio 5:7 .4 years from now the ratio of Thier age will be 3:4 .find their present age .

Answer 1

Answer:

Let common ratio between hari's age and Hary’s age be x.  Therefore, age of hari and Hary will be 5x years and 7x years respectively. After 4 years, the age  of hari and Hary will be (5x + 4) years and (7x + 4) years respectively.

According to the question, after four years, age in ratio will be 3:4

5x+4 / 7x+4 = 3/4

x=4

By inserting the value of x

Age of hari = 20

Age of hary = 28

Answer 2

$\Large{\textbf{\underline{\underline{According\:to\:the\:Question}}}}$

Here we have,

Ratio = 5 : 7

Therefore,

After four year

Age of Hari = 5p

Also,

Age of Hary = 7p

Situation,

$\tt{\rightarrow\dfrac{5p+4}{7p+4}=\dfrac{3}{4}}$

4(5p + 4) = 3(7p + 4)

20p + 16 = 21p + 12

20p - 21p = 12 - 16

-p = -4

p = 4

Hence,

Present age of Hari = 5p

= 5 × 4

= 20

Present age of Hary = 7p

= 7 × 4

= 28