Question

the area of a circle is 13.86 hectares find the cost of fencing it at the rate of 60 paise per metre

Answer 1

area=13.86=πr^2

13.86=22/7*r^2

r=2.10000000000001


circumference=2πr

2*22/7*2.10

=13.2*60
=792

Answer 2

The cost of fencing is 79163.796 paise.

Step-by-step explanation:

Given : The area of a circle is 13.86 hectares.

To find : The cost of fencing it at the rate of 60 paise per meter ?

Solution :

The area of the circle is $A=\pi r^2$

We know, 1 Hectare =  10,000 Square Meters

So, 13.86 hectare = 13.86 × 10000 square meters

13.86 hectare = 138600 square meters.

The area of a circle is A=138600 square meters.

$138600=3.14\times r^2$

$r^2=\frac{138600}{3.14}$

$r=\sqrt{\frac{138600}{3.14}}$

$r=210.095$ meter

The circumference of the circle field is $C=2\pi r$

$C=2\times 3.14\times 210.095$

$C=1319.3966$ meter.

The cost of fencing it at the rate of 60 paise per meter.

The cost is given by,

$Cost=1319.3966\times 60$

$Cost=79163.796\ paise$

Therefore, the cost of fencing is 79163.796 paise.

#Learn more

The area of a circle is 13.86 hectares .find the cost of fencing it at the rate of 60 paise per metre

https://brainly.in/question/12274896