Question

15. The ratio of present ages of two brothers is 7:9. If the ratio of their ages 4 years
hence will be 4:5, then their present ages are :
a) 14 yrs,18 yrs. (b) 28yrs, 36 yrs (C) 27 yrs, 24 yrs (d) 45 yrs, 18 yrs
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Answer 1

Answer:

Answer will be 28yrs , 36yrs.

THANK YOU

Answer 2

Answer:

Let the present age of two brothers be 7x and 9x

After 4 years

Age of two brothers 7x+4 and 9x+4

According to the question

$\frac{7x + 4}{9x + 4} = \frac{4}{5} \\ 5(7x + 4) = 4(9x + 4) \\ 35x + 20= 36x + 16 \\ 36x - 35x = 20 - 16 \\ x = 4$

Age of two brothers=>7x=7×4=28 years and 9x= 9×4=36 years

option (b) is correct