Question

7 yr ago, the ages of A and B were in the ratio 4 : 5 and 7 yr hence, they will be in the ratio 5 : 6. The present age of A and B is ??



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Answer 1

Answer:

SOLUTION:-

Let the present age of A= 7x years

⇨The present age of B= 5x years

⇨After 10 years, their ages will be 

A=7x+10 years and

B=5x+10 years

⇨The ratio of their ages after 10 years is 9:7.

∴5x+107x+10=79

⇒49x+70=45x+90

⇒49x−45x=90−70

⇒4x=20

⇒x=5

∴ Present age of A= 7×5=35 years and present age of B= 5×5=25 years.

✔Hence, the present age of A and B=25

Answer 2

Answer:

7 yr ago, the ages of A and B were in the ratio 4 : 5 and 7 yr hence, they will be in the ratio 5 : 6. The present age of B is. Description for Correct answer: Let 7 yr ago, ages of A and B are 4x yr and 5x yr, respectively.

Explanation:

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