Calculations: From I and II, The radius of the circular farm (R) = 7 m
⇒ Circumference of the circular farm = 2πR =
= 44 m
Rectangular Field Perimeter = 2(Length + Breadth) = 2 × (20 + 10) = 2 × 30 = 60 m
Cost of Fencing per meter × Perimeter of Rectangular Field = Rs. 600
⇒ Cost of Fencing per meter × 60 = Rs. 600
⇒ Cost of Fencing per meter = Rs.
= Rs. 10
Now, Cost of fencing a circular farm = Cost of Fencing Per meter × Circumference of the circular farm
⇒ Cost of fencing a circular farm = 10 × 44 = Rs. 440
∴ The data in both statements I and II together are necessary to answer the question.