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    Even though I got question 5 correct, I don't exactly know why what I put was the answer:

    http://www.ocr.org.uk/download/pp_07..._jun_l_gce.pdf

    It's the one with a rectangular enclosure; I know that to get the area you times length by width however, it says that the right side of the enclosure is x and then suggests for reasons unknown to me that the bottom/top side is 20 - 2x

    Why is this? Why can't it be 20 - 3x for example?
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    (Original post by Dededex)
    Even though I got question 5 correct, I don't exactly know why what I put was the answer:

    http://www.ocr.org.uk/download/pp_07..._jun_l_gce.pdf

    It's the one with a rectangular enclosure; I know that to get the area you times length by width however, it says that the right side of the enclosure is x and then suggests for reasons unknown to me that the bottom/top side is 20 - 2x

    Why is this?
    What is the length of the rope?
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    (Original post by Mr M)
    What is the length of the rope?
    20 m - but why does that suddenly make the other side 20 - 2x?
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    (Original post by Dededex)
    20 m - but why does that suddenly make the other side 20 - 2x?
    The rope is formed into three sides of a rectangle.

    width + x + x = 20

    Make width the subject.
 
 
 
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