2012 · Q48
If the area of a circle is equal to the area of a square with side 2*sqrt(pi) units, what is the diameter of the circle?
Elementary MathematicsMensuration
- A1 unit
- B2 units
- C4 units
- D8 units
Explanation
pi*r^2 = (2*sqrt(pi))^2 = 4*pi gives r = 2, so diameter = 4 units.