Question

The present age of me and my brother is ratio 3:4 five years from now the ratio of our ages would be 4: 5 find our present ages

Answer 1

let the ratio be X.

then ages will be 3x and 4x.

5years later, younger boy age=3x-5

elder boy age=4x-5

now, a/q

3x-5/4x-5=5/7

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

21x-35=20x-25

21x-20x= -25+35

X=10years

younger boy age=3x=3*10=30

elder boy age =4x=4*10=40

Answer 2

let the ratio be X.

then ages will be 3x and 4x.

5years later, younger boy age=3x-5

elder boy age=4x-5

now, a/q

3x-5/4x-5=5/7

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

21x-35=20x-25

21x-20x= -25+35

X=10years

younger boy age=3x=3*10=30

elder boy age =4x=4*10=40