document.write( "Question 301649: A 5-inch-thick concrete slab is being poured for a circular patio 20 feet in diameter. Concrete costs $45 per cubic yard. Find the cost of the concrete, to the nearest cent. \n" ); document.write( "
Algebra.Com's Answer #216306 by Fombitz(32388)\"\" \"About 
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Calculate the volume of a cylinder 5 inches high with a diameter of 20 feet.
\n" ); document.write( "Convert all units to yards first.
\n" ); document.write( "H=5 inches=5in (1 yd/36 in)= 0.167 yd
\n" ); document.write( "D=20 ft=20 ft(1 yd/3 ft)= 6.67 yd
\n" ); document.write( "Volume of a cylinder is,
\n" ); document.write( "\"V=pi%2AD%5E2%2AH=pi%2A6.67%5E2%2A0.167=23.34\"
\n" ); document.write( "Now you have 23.34 cubic yds of concrete and it costs $45 per cubic yd.
\n" ); document.write( "\"P=23.34%2A45=1050.34\"
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\n" ); document.write( "It will cost $1050.34 for the concrete.
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