Question

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

Answer 1

Answer:

B's age=28 yrs

Step-by-step explanation:

let age of A be 5x and age of B be 7x

4 yrs from now

A's age= 5x + 4

B's age= 7x + 4

A.T.Q

(5x+4) /  (7x+4) = 3/4

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

20x +16 = 21x + 12

x= 16 - 12

x= 4

A's present age= 5x = 5 x 4= 20 yrs

B's present age = 7x= 7 x 4 = 28 yrs