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OleMash [197]
3 years ago
11

Sally is having a problem with her puppy leaving the yard so she decides to build a new fence. the length of the yard is 10 feet

more than 2 times the width. she needs 56 feet of fencing to do the job. find the length of the yard.
Mathematics
2 answers:
Mila [183]3 years ago
8 0

The length of the yard is \boxed{22\text{ feet}}.

Further explanation:

It is given that Sally is having a problem with her puppy leaving the yard so she decides to build a new fence.

The length of the yard is 10 feet more than 2 times the width.

She needs 56 feet of fencing to do the job.

Consider the length and width of the yard as x feet and y feet respectively.

And it is given that the length of yard is 10 feet more than 2 times the width.

So, the equation for length is as follows:

\boxed{x=2y+10}         ....(1)

Therefore, the perimeter is calculated as follows:

\begin{aligned}P&=(2\times \text{length})+(2\times \text{breadth})\\&=2x+2y\\&=2(2y+10)+2y\end{aligned}  ...(2)

Also given that she needs 56 feet of fencing to do the job.

Thus, the perimeter of the yard is 56 feet.

Substitute the value of perimeter in equation (2) to obtain the value of y as  follows:

\begin{aligned}2(2y+10)+2y&=56\\4y+20+2y&=56\\6y&=56-20\\6y&=36\\y&=6\end{aligned}

The value of y is 6 feet.

Therefore, the width of the fence is 6 feet.

Now, substitute the value of y in equation (1) to find the value of x as,

\begin{aligned}x&=(2\times 6)+10\\&=12+10\\&=22\end{aligned}

Therefore, the length of the yard is \boxed{22\text{ feet}}.

Learn more

1. Problem on the whole numbers are positive integers brainly.com/question/1852063.

2. Problem on the adding and simplifying the numbers brainly.com/question/894273

Answer details:

Grade: Middle school

Subject: Mathematics

Chapter: Mensuration

Keywords: Perimeter, area, rectangle, square, triangle, cube, cuboid, rational numbers, irrational numbers, real numbers, whole numbers, natural numbers, fraction, integers.

Anna35 [415]3 years ago
4 0
Let x be the yard length, then if <span>the length of the yard is 10 feet more than 2 times the width, the length of the yard is 2x+10. The perimeter is 2 lengths + 2 widths, so P=2x+2(2x+10) .
</span>
Since Sally <span>needs 56 feet of fencing to do the job, P=56 ft. and
</span>
<span>2x+2(2x+10)=56,
</span><span>
</span><span>2x+4x+20=56,
</span><span>
</span><span>6x=56-20,
</span><span>
</span><span>6x=36,
</span><span>
</span><span>x=6 ft. and 2x+10=12+10=22 ft.
</span><span>
</span><span>Answer: The length of the yard is 22 feet</span>


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