document.write( "Question 1012395: A sidewalk is to be placed around a circular fountain whose diameter is 30 feet.The width of the sidewalk is 6ft.A contractor will charge $2.48 per sq.ft.to construct the sidewalk.What will be the cost to construct the sidewalk? \n" ); document.write( "
Algebra.Com's Answer #628308 by macston(5194)\"\" \"About 
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\n" ); document.write( "Area of sidewalk=Area of sidewalk and fountain - area of fountain
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\n" ); document.write( "Diameter of fountain + sidewalk=30 ft + 12 ft=42 feet
\n" ); document.write( "Radius of fountain + sidewalk = 21 feet
\n" ); document.write( "Radius of fountain = 15 feet
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\n" ); document.write( "Area of sidewalk=\"%28pi%2821ft%29%5E2%29-%28pi%2815ft%29%5E2%29\"
\n" ); document.write( "Area of sidewalk=\"pi%28%2821ft%29%5E2-%2815ft%29%5E2%29\"
\n" ); document.write( "Area of sidewalk=\"pi%28441ft%5E2-225ft%5E2%29\"
\n" ); document.write( "Area of sidewalk=\"pi%28216ft%5E2%29\"
\n" ); document.write( "Area of sidewalk=678.58 ft^2
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\n" ); document.write( "Cost of sidewalk= Area x cost per unit area
\n" ); document.write( "Cost of sidewalk= 678.58 ft^2 x $2.48 per ft^2
\n" ); document.write( "Cost of sidewalk= $1682.88
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