Geometrymedium · Past Paper
If the circumference of a circle is equal to the perimeter of a square, then the ratio of their areas is:
A22:7
B11:14
C14:11
D7:22
✓ Correct Answer: C — 14:11
2*pi*r = 4a => a = pi*r/2. Area Circle / Area Square = (pi*r^2) / (pi^2*r^2/4) = 4/pi = 4/(22/7) = 28/22 = 14/11.
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