document.write( "Question 630350: At the park there is a pool shaped like a circle with radius 11yd. A ring-shaped path goes around the pool. Its width is 5 yd . We are going to give a new layer of coating to the path. If one gallon of coating can cover 8yd^2, how many gallons of coating do we need? Note that coating comes only by the gallon, so the number of gallons must be a whole number. (Use the value 3.14 for pi.) \n" ); document.write( "
Algebra.Com's Answer #396873 by ankor@dixie-net.com(22740)\"\" \"About 
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At the park there is a pool shaped like a circle with radius 11yd.
\n" ); document.write( " A ring-shaped path goes around the pool.
\n" ); document.write( " Its width is 5 yd . We are going to give a new layer of coating to the path.
\n" ); document.write( " If one gallon of coating can cover 8yd^2, how many gallons of coating do we need?
\n" ); document.write( " Note that coating comes only by the gallon, so the number of gallons must be a whole number.
\n" ); document.write( ":
\n" ); document.write( "With a 5' path around the pool the overall radius (including the path)
\n" ); document.write( "11 + 5 = 16 ft
\n" ); document.write( ":
\n" ); document.write( "path area (pa) = Overall area - pool area
\n" ); document.write( "pa = (3.14*16^2) - (3.14*11^2)
\n" ); document.write( ":
\n" ); document.write( "pa = 803.84 - 379.94
\n" ); document.write( "pa = 423.9 sq/yds
\n" ); document.write( ":
\n" ); document.write( "Find the amt of coating needed: \"423.9%2F8\" = 52.9875 ~ 53 gallons
\n" ); document.write( ":
\n" ); document.write( ":
\n" ); document.write( "Note that if you used a more accurate value for pi (like the one on your calc),
\n" ); document.write( "you would get slightly more than 53 gal, so if you were actually doing this,
\n" ); document.write( "54 gallons would be advisable. \n" ); document.write( "
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