Question

Ratio of ages of brother and sister is 4:5.
After 6 years the ratio of their ages will be 5:6. Find the present age of brother

Answer 1

let the present age ratio of brother and sister be 4x and 5x

after 6 years

age of brother=4x+6

age of sister=5x+6

their ratio=5:6

4x+6/5x+6 = 5/6

(cross multiply)

6(4x+6) = 5(5x+6)

24x+36 = 25x+30

24x-25x=30-36

-x = -6

(minus sign cancels)

hence, x = 6

present age of brother= 24

present age of sister = 30

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Answer 2

Answer:

here is your answer

Step-by-step explanation:

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