Multiple choice

If the cost of gardening a circular field at the rate of 10 Rs./ m2 is Rs. 3465 and the side of a square is equal to the diameter of the circle. Then find the perimeter of the square ?

  1. 76

  2. 92

  3. 84

  4. 68

  5. 65

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Circle area = cost/rate = 3465/10 = 346.5 m². Area = πr², so r = √(346.5/π) ≈ 10.5m. Diameter = 2r ≈ 21m. Square side = diameter = 21m. Perimeter = 4 × side = 4 × 21 = 84m. The key relationship is that the square's side equals the circle's diameter.