ABC26GN4540 · Area

Subject: General Aptitude · Chapter: Area · Exam: · Marks: · Difficulty:

What will be the cost of building a fence around a circular field with area equal to 18634 sq. metres if the cost of building the fence per metre is ₹ 365?

(a)₹ 1,76,660

(b)₹ 2,43,250

(c)₹ 56,60,220

(d)₹ 68,01,410

(e)None of these

Answer

Answer (as printed): A

Explanation

$\pi R^{2}=18634 \Rightarrow R^{2}=18634 \times \frac{7}{22}=5929 \Rightarrow R=77 \mathrm{m}$. Circumference $=\left(2 \times \frac{22}{7} \times 77\right) \mathrm{m}=484 \mathrm{m}$. ∴ Cost of fencing $=₹(365 \times 484)=₹ 176660$.

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