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a man sold an article at a profit of 25%. if he had bought it at 10% less and sold for 10RS more, the gain would have been 40%. find its cost price


  • maths -

    plz answer this

  • maths -

    S = sale price.
    C = cost.
    (S - C)/C = 0.25
    (rewrite as S = 1.25 C;

    (S + 10 -0.9C)/(0.9C) = 0.40

    Solve for C

    0.35C + 10 = 0.36 C
    0.01C = 10
    C = 1000 Rupees

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