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the cost ol putne up a eFrom a circular metal sheet of radius 9 cm, a circle of radius 4 cm is removed. Find the area of theremaining sheet. (Take π = 3.14) |
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Answer» Outer radius of circular sheet, R = 4 cm Inner radius of circular sheet, r = 3 cm Remaining area =πR^2-πr^2=3.14 × 4 × 4 − 3.14 × 3 × 3 = 50.24 − 28.26 = 21.98 cm^2 |
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