Question

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

Answer 1

Answer:

20 and 28 years

Step-by-step explanation:

Let present age of hari be 5x

then present age of harry be 7x

According to question

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

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

20x+16=21x+12

x=4

present age of hari=5x=5*4=20 years

present age of harry=7x=7*4=28 years.

Answer 2

Step-by-step explanation:

$age \: of \: hari = 5x$

$age \: of \: harry = 7x$

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

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

$20x + 16 = 21x + 12$

$16 - 12 = 21x - 20x$

$x = 4$

$age \: of \: hari = 4 \times 5 = 20age$

$age \: of \: harry = 7 \times 4 = 28 \: age$