document.write( "Question 617034: A circular flower garden has a radiusof 16 feet. You want to lay a circular sidewalk 2 feet wide around the entire garden. If the walk will be 3 inches thick, how many cubic yards of concrete will you need?
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Algebra.Com's Answer #388087 by richwmiller(17219)\"\" \"About 
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find the area of the circle with a radius of 16 ft
\n" ); document.write( "find the area of the circle with a radius of 18 ft
\n" ); document.write( "subtract
\n" ); document.write( "multiply by 1/4 - [ 3 inches is 1/4 ft]
\n" ); document.write( "and that is cubic ft
\n" ); document.write( "1 cubic yd is 27 cubic ft 3*3*3
\n" ); document.write( "divide by 27 to get cubic yds.
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