Multiple choice

The cost of gardening of a circular area C at the rate of 10 m2 is Rs 3465. The side of square S is equal to the diameter of circle C. Find the circumference of square S.

  1. 72

  2. 74

  3. 42

  4. 84

  5. 88
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Cost of gardening = Rs 3465 at rate of Rs 10 per m² means area = 346.5 m². For circle C: πr² = 346.5, so r² = 346.5/π = 110.25, giving r = 10.5 m. Diameter = 21 m, which is the side of square S. Circumference (perimeter) of square S = 4 × 21 = 84 m.

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