Multiple choice

The area of a circular plot is $3850$ square metre. What is the circumference of the plot?

  1. $200m$
  2. $220m$
  3. $240m$
  4. $330m$
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B Correct answer
Explanation

Using the area of a circle formula, pi * r^2 = 3850, we find the radius r = 35 meters. The circumference is then calculated as 2 * pi * r = 2 * (22/7) * 35 = 220 meters.

AI explanation

Using the formula for the area of a circle, pi times radius squared equals 3850, so the radius squared is 3850 divided by 22/7, which gives 1225 and a radius of 35 metres. The circumference formula is 2 times pi times the radius, so 2 times 22/7 times 35 yields 220 metres.

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