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Question 1198424: Cynthia Besch wants to buy a rug for a room that is 22 ft wide and 30 ft long. She wants to leave a uniform strip of floor around the rug. She can afford to buy 560 square feet of carpeting. What dimensions should the rug have?
Found 2 solutions by math_tutor2020, MathTherapy: Answer by math_tutor2020(3816) (Show Source): Answer by MathTherapy(10551) (Show Source):
You can put this solution on YOUR website! Cynthia Besch wants to buy a rug for a room that is 22 ft wide and 30 ft long. She wants to leave a uniform strip of floor around the rug. She can afford to buy 560 square feet of carpeting. What dimensions should the rug have?
Let the width of the uniform strip be W
With dimensions of the room being 22 ft by 30 ft, dimensions of the rug will be 22 - 2W, and 30 - 2W
We then get the following RUG-AREA equation: (22 - 2W)(30 - 2W) = 560
2(11 - W)2(15 - W) = 2(2)(140) ------ Factoring out 2(2), or 4 on each side
(11 - W)(15 - W) = 140
(W - 1)(W - 25) = 0 --- Factoring trinomial
W - 1 = 0 OR W - 25 = 0
Width of unifrom strip, or W = 1 or W = 25 (ignore, as width of strip CANNOT be > the room's width or length)
With width (W) of strip being 1 foot, dimensions of rug are: 22 - 2(1) by 30 - 2(1) = 20 ft by 28 ft.
** NOTE: You don't need to use the quadratic equation formula as the other person did. Too much work, too much time,
and DEFINITELY too many large numbers, which can make one, prone to errors!!
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