Question

the diameter of a circular park is 98m . find the cost of fencing it at Rs 4 per meter?​

Answer 1

Answer:1232 rupees

Step-by-step explanation:

Diameter=98m

So,radius=98/2=49m

Circumference of circle formula =2*pie(22/7)*radius

=2*22/7*49=308m

Therefore cost of fencing=308*4=1232 rupees

Answer 2

To find : cost of fencing circular park at Rs $4$ per.

Given : diameter of circular park = $98\ m$

Solution :  

• According to question we have to find cost of fencing circular park .
• We are given that , diameter of circular park is $98\ m$ .
• Then radius of circle = $\frac{98\ m}{2} = 49\ m$

• Therefore , to find cost of fencing circular park we find circumference of circle .
• Circumference of circle = $2\pi r$

• Substituting the value ,

       Circumference of circle = $2\times 3.14\times 49\ m$

                                              $= 307.72\ m$

• Cost of fencing  = $307.72\ m\times 4Rs$

                                   $= 1230.88Rs$  

Hence , cost of fencing circular park is $1230.88Rs$