3. Find the area of the following circles. (Take = 23)
b. diameter = 14 cm
a.
radius = 21mm
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Answer:
a. Area of circle= pie×radius^2
=22/7×21^2
=22/7×441
=22×63
=1386mm^2
b.Diameter=14cm
Radius=14/2=7cm
Area of circle=22/7×7^2
=22/7×49
=22×7
=154cm^2
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