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Example Questions
Example Question #1 : How To Find The Perimeter Of A Rectangle
Robert is designing a rectangular garden. He wants the area of the garden to be 9 square meters. If the length of the lot is going to be three meters less than twice the width, what will the perimeter of the lot be in meters?
10
1.5
6
12
3
12
Let l be the length of the garden and w be the width.
By the specifications of the problem, l = 2w-3.
Plug this in for length in the area formula:
A = l x w = (2w - 3) x w = 9
Solve for the width:
2w²- 3w - 9 =0
(2w + 3)(w - 3) = 0
w is either 3 or -3/2, but we can't have a negative width, so w = 3.
If w = 3, then length = 2(3) - 3 = 3.
Now plug the width and length into the formula for perimeter:
P = 2 l + 2w = 2(3) + 2(3) = 12
Example Question #1 : How To Find The Perimeter Of A Rectangle
Find the perimeter of a rectangle that has a length of and a width of
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Example Question #11 : How To Find The Perimeter Of A Rectangle
Find the perimeter of a rectangle that has a length of and a width of
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Example Question #12 : How To Find The Perimeter Of A Rectangle
Find the perimeter of a rectangle that has a length of and a width of
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Example Question #13 : How To Find The Perimeter Of A Rectangle
Find the perimeter of a rectangle that has a length of and a width of
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Example Question #14 : How To Find The Perimeter Of A Rectangle
Find the perimeter of a rectangle that has a length of and a width of
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Example Question #15 : How To Find The Perimeter Of A Rectangle
Find the perimeter of a rectangle that has a length of and a width of
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Example Question #16 : How To Find The Perimeter Of A Rectangle
Find the perimeter of a rectangle that has a length of and a width of
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Example Question #17 : How To Find The Perimeter Of A Rectangle
Find the perimeter of a rectangle that has a length of and a width of
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Example Question #18 : How To Find The Perimeter Of A Rectangle
Find the perimeter of a rectangle that has a width of and a length of
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