Question

29. The area of a circular play ground is 22176 cm2
Find the cost of fencing
this ground at the rate of 50 per metre.​

Answer 1

Answer:

The total cost of fencing this is =₹264

Step-by-step explanation:

The area of the ground is=πR^2=22176cm^2

radius =R

πR^2=22176cm^2

=22R^2=22176cm^2

7

=22R^2=22176cm^2×7. (by cross multiple)

=R^2=22176cm^2×7/22

=R^2=155232cm^2/22

=R=√7056cm^2

=R=84cm

radius=84cm

circumference of circle is =2πR

so,

2×22/7×84

=2×22×12

=528cm

circumference of circle is=528cm=528/100=5.28m

the cost of fencing this ground =₹50 per meter

the total cost of fencing this ground=5.28m×50=₹264