The area of the circle whose circumference is 22cm is _______
A) 49 cm
2 B) 154 cm
2 C) 77 cm
2 D) 145 cm
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Circumference of a circle
2πr = 22
2*22/7*r = 22
r = 22*7/2*22
r = 7/2 = 3.5 cm
Area of a circle
= πr^2
r = 7/2
= 22/7*7/2*7/2
= 77/2
= 38.5 cm
The area of circle is 38.5 cm.
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