Question

Find the cost of fencing around a circular field of diameter 28 m at the rate of Rs1.50 a meter?

Answer 1

Hey dear !!

_________________________________

In this question first we need to find the area of the circular field then we have to multiply it with Rs. 1.50 to get the cost of fencing around the circular field .

So, lets do it !!!

====>>>> In the example

we have given the following values ,

cost of fencing per meter = Rs 1.50

Diameter of circular field = 28

We have to find the area , a = ?

$r = \frac{d}{2} \\ \\ r = \frac{28}{2} \\ \\ r = 14$

We know that,

Area = 2 π r

= 2 x 22/7 x 14

= 2 x 22 x 2

= 44 x 2

= 88 sq. m

So, area of circle is 88 sq.m

Now just multiply it with 1.50

cost of fencing = 88 x 1.50

= Rs. 132

So, the cost of fencing the circular field is Rs. 132

Hope it will help you !!

Thanks !!

[ Be Brainly ]