Question

a and b are 50 and 70 years old how many years ago was ratio of their ages 2:3​

Answer 1

Answer:

10 years ago

Step-by-step explanation:

may be right answer

Answer 2

Answer:

it's was 10 years ago

Step-by-step explanation:

given that currently ages are 50 and 70 respectively and then before some y years ages were in ratio 2:3.

that is we can written this as ,

$\frac{2}{3} = \frac{50 - y}{70 - y}$

cross multiplying we have,

$2(70 - y) = 3(50 - y)$

that is , 140-2y = 150-3y

this can rewritten as,

150-140=3y-2y

implies y = 10.

that is 2:3 was the ratio before 10 years ago.

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