Question

A rectangular field needs to be fenced up using mesh wire. The length of the field is ( 5x + 20 )m and its width is x metre.

a) Given the area of the field is 5100m² , calculate the cost of fencing the field if the cost of the mesh wire used is $20 per metre.​

Answer 1

Answer:

Let

is the radius of the circular sector and

is the angle cretaed by it.<br> Here, perimeter of the circular sector

<br>

<br>

<br> Now, area of the circlular sector,

<br>

<br>

<br>

<br> For maximum area,

should be

.<br>

<br> So, maximum area,

<br>

Step-by-step explanation:

Let

is the radius of the circular sector and

is the angle cretaed by it.<br> Here, perimeter of the circular sector

<br>

<br>

<br> Now, area of the circlular sector,

<br>

<br>

<br>

<br> For maximum area,

should be

.<br>

<br> So, maximum area,

<br>