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vivekanand H s SCHOOL

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the difference of ages between 2 sisters is 10 years, 15 years ago elder 1 was twice as old as younger age. find the both present age?

  • vivekanand H s SCHOOL - ,

    b-a=10
    (b-15) = 2(a-15)

    (a+10-15) = 2(a-15)
    a-5 = 2a-30
    a = 25

    So, the sisters are 25 and 35

    check:
    15 years ago they were 10 and 20

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