document.write( "Question 127222: find the area of the space enclosed by two concentric circles of radii 15cm & 13cm. \n" ); document.write( "
Algebra.Com's Answer #93200 by edjones(8007)\"\" \"About 
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pi*r^2=A
\n" ); document.write( "pi*15^2=225*pi
\n" ); document.write( "pi*13^2=169*pi
\n" ); document.write( "-------------subtract
\n" ); document.write( "=========56*pi cm Ans
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