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    fobre's Avatar
    fobre Posts: 1, Reputation: 1
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    #1

    Oct 18, 2011, 04:32 AM
    Rectangle algebra
    The length of the rectangle is 4cm more than its width if the area of the rectangle is 45cm, what is its width?
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #2

    Oct 18, 2011, 10:34 AM
    Assign a variable to the rectangle's sides.

    If the length of the rectangle is l, then the width would be l-4, right?

    The area is 45 cm^2, and the area is obtained through the product of the length and the width, this gives:



    Can you solve this to get the length of the rectangle? Then, you have enough information to guess the width :)
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