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Harriet wants to put up fencing around three sides of her re
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15 Jun 2020, 01:23
15 Jun 2020, 01:23
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85% (00:47) correct
14% (01:24) wrong based on 54 sessions
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Harriet wants to put up fencing around three sides of her rectangular yard and leave a side of 20 feet unfenced. If the yard has an area of 680 square feet, how many feet of fencing does she need?
A) 34
B) 40
C) 68
D) 88
E) 102
A) 34
B) 40
C) 68
D) 88
E) 102
Re: Harriet wants to put up fencing around three sides of her re
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15 Jun 2020, 01:23
15 Jun 2020, 01:23
Expert Reply
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Re: Harriet wants to put up fencing around three sides of her re
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15 Jun 2020, 05:53
15 Jun 2020, 05:53
Carcass wrote:
Harriet wants to put up fencing around three sides of her rectangular yard and leave a side of 20 feet unfenced. If the yard has an area of 680 square feet, how many feet of fencing does she need?
A) 34
B) 40
C) 68
D) 88
E) 102
A) 34
B) 40
C) 68
D) 88
E) 102
Here's a sketch of what we're dealing with:
Given: area of the rectangle = 680
Area = (base)(height) = (x)(20) = 20x
So: 20x = 680
Solve: x = 680/20 = 34
We now have:
Perimeter = 34 + 34 + 20 = 88
Answer: D
Cheers,
Brent
