Question

The age of hari and harry are in the ratio 5:7. 4years from now ,the ratio of their ages will be 3:4.Find their present age

Answer 1

Answer:

Hari is 20 years, Harry is 28 years

Step-by-step explanation:

See attached picture

Answer 2

$\huge \bf \red{Question - }$

The age of Hari and Harry are in ratio 5:7.Four years from now the ratio of their ages will be 3:4.Find their present ages.

$\huge \bf \red{Answer}$

Let the ages as x.

So,Hari age will be 5x.

And,Harry age will be 7x.

After four years,Hari's age=(4+5x)

After four years,Harry's age=(4+7x)

This is given to be,3:4.

$\sf{ \frac{4 +5x }{4 + 7x} = \frac{3}{4} }$

(Cross multiplication gives,)

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

16+20x=12+21x

20x-21x=12-16

-1x=-4

$\sf{x = \frac{ \cancel{ - }4}{ \cancel{ - }1}} = 4$

Hence the answer is 4.