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16 October, 08:16

The ratio of Lily's age to Fanny's age is 1:2 now. In 9 years' time, the ratio of Lily's age to Fanny's age become 3:5. How old is Lily now?

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  1. 16 October, 11:12
    0
    L - Lily's age now

    F - Fanny's age now

    L:F = 1:2

    F=2L

    (L+9) - Lily's age in 9 years

    (F+9) = (2L + 9) - Fanny's age in 9 years

    (L+9) : (2L + 9) = 3 : 5

    5 (L+9) = 3 (2L + 9)

    5L + 45 = 6L + 27

    L = 18

    Lily now is 18 years old.
  2. 16 October, 12:09
    0
    L=1F=2L is half that of F

    9 years later

    L=3F=5

    L is 60% that of L's ageI think it's 10 bc there has to be at least 9 years old
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