A wire is bent to form a square of side 22 cm . If the wire is re-bent to form a circle, calculate the circumference of the circle obtained.
A: 57.97cm
B: 67.03cm
C: 12.41cm
D: 78cm
Area of square = L²
Area of square = 22²
= 484 cm²
Area is equal therefore area of circle = 484 cm²
484 = πr²
484 = (22/7) x r²
Divide both sides by the value of pie and find the square root there after
Radius =12.41 cm
Circumference = 2πr
Circumference = 2×(22/7) × 12.41
C = 78 cm
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