Question

The cost of fencing a circular field at the rate of Rs.25 per metres is Rs.5275. find the diameter of the field

Answer 1

circumference of the field =5275/25

=211 units

So. 2* pi *r = 211

r. =211 * 1/2 * pi

r =1477/44 units

diameter = 2r = 1477/22 units

Answer 2

Circumference of the circle =5275/25 m

So,

$2\pi \: r = 215$

Or, 2×22/7×r=215

So,r = 215×7/(22×2)

=1505/44

r=d/2

1505/44=d/2

1505×2 /44=d

So,d=3010/44

=68.4

I hope it helps you