Cost of ploughing 1m2 of the field = Rs1.50
The total cost of ploughing the field = Rs 5775
So,
Area of the field = The total cost of ploughing the field/Cost of ploughing per square. meter
= 5775/1.50
=3850m2
Given: A field is in the form of a circle.
Let the radius of the field = r
∴ Area of the field = πr2
⇒ 3850 = πr2
⇒ r2 = 1225
⇒ r = √1225
⇒ r = √(5×5×7×7)
⇒ r = 35m
Now,
Circumference = 2πr
= 2 x 22/7 x 35
= 2 × 22 × 5
= 220 m
Cost of fencing 1m of the field = Rs 8.50
Cost of fencing 220 of the field = Rs 8.50 × 220
= Rs 1870