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17 December, 02:53

A box half full of apples weighs 40kg and the same box one fifth full weighs 22kg, what does the box weigh when empty?

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  1. 17 December, 03:01
    0
    1/2 = 40kg

    1/5 = 22kg

    1/2 = 5/10

    1/5 = 2/10

    3/10 is the difference between 18kg.

    This means 1/10 of the box filled with apples is 6kg.

    40 - (5 x 6) = 10kg. The box weighs 10kg alone.
  2. 17 December, 03:06
    0
    1/2 = 40kg

    1/5 = 22kg

    1/2 = 5/10

    1/5 = 2/10

    3/10 is the difference between 18kg.

    This means 1/10 of the box filled with apples is 6kg.

    40 - (5 x 6) = 10kg. The box weighs 10kg alone.
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