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The ratio John's age to Ryan's age is 3:1 now . 25 years later , the ratio will become 4:3 .How old is John now ?

  • Maths -

    j:r = 3:1, so j=3r

    (j+25)/(r+25) = 4/3
    (3r+25)/(r+25) = 4/3
    3(3r+25) = 4(r+25)
    9r+75 = 4r+100
    5r = 25
    r = 5

    so, John is 15
    in 25 years, the two will be 40 and 30

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