Multiple choice

A one-metre long rope has been given the shape of a circle. The area of this circle is

  1. 890.10 cm2

  2. 795.45 cm2

  3. 780.00 cm2

  4. 600.00 cm2
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Circumference = 100 cm. 2 * pi * r = 100 => r = 50/pi. Area = pi * r^2 = pi * (50/pi)^2 = 2500/pi. 2500 / 3.14159 approx 795.77 cm^2.

AI explanation

The one-metre rope forms the circumference of the circle, so 2 * (22/7) * r = 100 cm, yielding a radius of 35/2 cm. Using the area formula for a circle, the area is (22/7) * (35/2)^2 = 795.45 cm2.

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