2. From a circular metal sheet of radius 9 cm, a circle of radius 4 cm is removed. Find the area of the
remaining sheet. (Take = 3.14)
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Answer:
area of remaining sheet=area of circle having radius 9 cm-area of circle having radius 4 cm
area of circle1=3.14×81=254.34
area of circle2=3.14×16=50.24
therefore required area of remaining sheet =254.34-50.24 =204.10sq cm
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