Question
Steel is used to make a hemispherical bowl that is 0.3
cm thick. The bowl's inner radius is 9 cm. Find the bowl's outside curved surface.Solution
Thickness =R-r 0.3cm =R-9 R=9.3cm. The curved surface of the hemispherical bowl =2 πR2 =2×22/7×9.3×9.3 =543.65cm2
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