Question

the ages of A and B are in the ratio 5:7 4 years from now the ratio of their ages will be 3:4 find the present ages

Answer 1

Answer:

20,28

Let the ratio of their ages be 5x and 7x

ATQ

$\frac{5x + 4}{7x + 4} = \frac{3}{4} \\ 4(5x + 4) = 3(7x + 4) \\ 20x + 16 = 21x + 12 \\ 20x - 21x = 12 - 16 \\ - x = - 4 \\ x = 4$

Therefore, age of A=5x=5×4=20

And B's age =7x=7×4=28

Step-by-step explanation:

Hope it helps...