Multiple choice general knowledge math & puzzles

The length of a rope, to which a cow is tied, is increased from 19m to 30m. How much additional ground will it be able to graze? Assume that the cow is able to move on all sides with equal ease

  1. 1696 sq m

  2. 1694 sq m

  3. 1756 sq m

  4. 1896 sq m
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The grazing area is a circle with radius equal to the rope length. Area = πr². New area = π(30)² = 900π, old area = π(19)² = 361π. Additional area = 900π - 361π = 539π. Using π ≈ 3.14, we get 539 × 3.14 = 1694.46 sq m, which rounds to 1694 sq m. The other options are incorrect calculations.

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