Question

The ages of A and B are in the ratio 5 : 7. Four years from now the ratio of their ages will be 3 : 4. The present age of B is :​

Answer 1

Answer: present age of b is 28

Step-by-step explanation:

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Answer 2

Answer:

Let the present age be x .

so , as per the question :-

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

by cross multiplication ,

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

20x + 16 = 21x + 12

16 - 12 = 21x  -20x

x = 4

A's age = 20 years

B's age = 28 years

Step-by-step explanation:

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