document.write( "Question 977266: The internal and external diameters of a hollow sphere are 20cm and 28cm respectively find the cost of painting all over the hollow hemisphere at 14paise per square cm
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Algebra.Com's Answer #598844 by Alan3354(69443)\"\" \"About 
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The internal and external diameters of a hollow sphere are 20cm and 28cm respectively find the cost of painting all over the hollow hemisphere at 14paise per square cm
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\n" ); document.write( "\"SA+=+pi%2Ad%5E2\"
\n" ); document.write( "There are 2 surfaces, the inside and the outside
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\n" ); document.write( "Total SA = \"pi%2A20%5E2+%2B+pi%2A28%5E2\" sq cms for a sphere
\n" ); document.write( "The hemisphere's SA ia 1/2 that.
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\n" ); document.write( "Multiply the cost/sq cm by the SA
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