Multiple choice

A square has an area of $40000$ sq. metres. Find the cost of the fence round it at Rs.$2.80$ per ${m}^{2}$.

  1. Rs. $1540$
  2. Rs.$2250$
  3. Rs.$2240$
  4. Rs.$2500$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The side of the square is sqrt(40000) = 200 m, so the perimeter is 4 x 200 = 800 m. At Rs 2.80 per metre, the cost is 800 x 2.80 = Rs 2240. The unit in the question says m^2 but fencing cost is per metre of length.

AI explanation

Using the area of a square formula, the side length is the square root of 40000, which is 200 m. The perimeter of the square is 4 multiplied by 200, equaling 800 m. Multiplying the perimeter by the fencing rate gives a total cost of 800 multiplied by 2.80, resulting in Rs. 2240.

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