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document.write( "Hi \n" );
document.write( "if the radius of a circle is 16 in. how far will the wheel roll in 4 turns? \n" );
document.write( "C = 2pir = 2*3.14*16in = 100.48in \n" );
document.write( "In four turns: 4*100.48in = 401.92in is how far it the wheel will roll.