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math

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a fruit seller buys 100kg apple at the rate of rs 20 per /kg . He sold 40 kg at a loss of 7%.At what price should we sell the remaining apple to make a profit of 15% on the whole transaction ??

  • math -

    cost to buy = 100(20) = rs 2000
    a profit of 15% is rs 300
    so his return must be rs 2300

    selling price of remaining apples --- rs x/kg

    so...
    .93(20)(40) + x(60) = 2300
    60x = 2300 - 744
    x = 25.93

    check:
    a loss of 7% ---> sold at .93(20) or 18.6

    so 40(18.6) + 60(25.93) = 2299.8 , close enough

  • math -

    i don't know

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