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sveta [45]
3 years ago
15

Farmer Ed has7500 meters of fencing, and wants to enclose a rectangular plot that borders on a river. If Farmer Ed does not fenc

e the side along the river, what is the largest area that can be enclosEd?
Mathematics
2 answers:
Nataly [62]3 years ago
8 0
First let's find out what would the sides of a square be.

7500 / 4 = 1875

Now we have 1875 as the sides and double at the top.

So 1875 * 3750 = 7031250 meters squared

timurjin [86]3 years ago
7 0

<u>Answer:</u>

7,031,250 m^2

<u>Step-by-step explanation:</u>

We know that:

<em>Area of a rectangle = length x width</em>

Also, since the rectangular plot shares a border with a river so Farmer Ed only needs to fence rest of the three sides therefore, we can write it as:

F = x + 2y

7500 = x + 2y

Solving this equation for x, we get:

x = 7500 - 2y --- (i)

Now substitute this value of x in the Area of rectangle:

Area = (7500 - 2y) * y

Area = -2y^2 + 7500y --- (ii)

The coefficient of -2 means that the largest area will be at:

-7500 / [2 (-2) ] = 1875 so y = 1875

So substituting this value of y in the equation (i) we get:

x = 7500 - 2(1875)

x = 7,031,250 m^2

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