document.write( "Question 158046: On Martin's car the total length of the windshield wiper arm, plus the blade, is 31 inches and it turns through a 110 degree angle. If the blade alone is 18 inches long to the nearest square inch how much area of the windshield is cleaned by the wiper blade? \n" ); document.write( "
Algebra.Com's Answer #116500 by joey_quizan(15)\"\" \"About 
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Sol:\r
\n" ); document.write( "\n" ); document.write( " A=Total Area
\n" ); document.write( " A=2*31*3.1461*(110/180)=119 sq.in.
\n" ); document.write( " a=area cleaned by wiper
\n" ); document.write( " a= 119-2*(31-18)*3.1461*(110/180)
\n" ); document.write( " Ans: a= 69 sq.in.
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