Question

The cost of fencing a circular field at the rate of 24 per metre is rs 5280 find area of field

Answer 1

Given

The cost of fencing a circular field at the rate of 24 per metre is rs 5280

cost Per metre = 24

Total Cost = 5280

so the length will be Total Cost / cost Per mere

= 5280/24 = 220 m.....

Now...

length = circumference of the field

220 = 2πr

220 = 2 × 22/7 × r

220 × 7 / 2 × 22 = r

70/2 = r

35 = r..

Now required to find the area...

Area of a circle = πr^2

= 22/7 ×(35)^2

=22 ×1125/7

=26950/7

=3850m^2