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Math Help - rectangle

  1. #1
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    rectangle

    yesterday I asked the question:
    a rectangle has a perimeter of 2 meters and a length of 70 centimeters. Find the area of the rectangle in square centimeters.

    Someone responded this way:
    So you need to find the width of the rectangle, as area is length times width, and we have width already.

    Perimeter=2*length + 2*width = 200 (2 meters=200 centimeters).
    plug in that length = 70.
    2*70 + 2*w=200.
    Subtract 140 from both sides
    2*w=60
    Divide by 2
    w=30.

    Area equals length times width
    A=w*l
    A=30*70
    So the area is 210

    MY QUESTION is A=30*70 ... when I times 30 by 70 on the calculator, I got 2100 - not 210. Did I do something wrong? Is the answer 210 or is it 2100.

    Thank you for looking.
    Last edited by fecoupefe; November 18th 2008 at 03:22 PM. Reason: too fast typing!
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  2. #2
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    the answer IS 2100!
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