If the ratio of age of a& b 6:5 present & 15 years after the ratio will became 9:8 then find the present age of a ?
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present age of A=6x
present age of B=5x
after 15 years
age of A=6x+15
age of B=5x+15
(6x+15)/(5x+15)=9/8
8(6x+15)=9(5x+15)
48x+120=45x+135
3x=15
x=5
present age of A = 6×5=30
present age of B=5x
after 15 years
age of A=6x+15
age of B=5x+15
(6x+15)/(5x+15)=9/8
8(6x+15)=9(5x+15)
48x+120=45x+135
3x=15
x=5
present age of A = 6×5=30
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