document.write( "Question 820323: the inner circumference of track is 220 meter. the track is 7 meter wide everywhere. calculate the cost of putting up fence along the outer circle at the rate of rupees 2 per meter. \n" ); document.write( "
Algebra.Com's Answer #493980 by LinnW(1048)\"\" \"About 
You can put this solution on YOUR website!
Steps to solve.
\n" ); document.write( "1) Find the radius r of the inner circle.
\n" ); document.write( "2) Find the radius R of the outer circle.
\n" ); document.write( "3) Find a formula for the outer circumference O .
\n" ); document.write( "4) Multiply O to give us the amount in rupees.\r
\n" ); document.write( "\n" ); document.write( "1) Use the formula for circumference C = (pi)(2r)
\n" ); document.write( "C = (pi)(2r)
\n" ); document.write( "divide each side by (pi)
\n" ); document.write( "C/(pi) = 2r
\n" ); document.write( "divide each side by 2
\n" ); document.write( "C/(2(pi)) = r\r
\n" ); document.write( "\n" ); document.write( "2) R, the outer radius = r + 7 = C/(2(pi)) + 7
\n" ); document.write( "3) O, the outer circumference = (pi)*(2R) = \"%28pi%29%2A%282%2A%28+C%2F%282%28pi%29%29+%2B+7+%29%29\"
\n" ); document.write( "or \"%28pi%29%2A%282%2A%28+220%2F%282%28pi%29%29+%2B+7+%29%29\", where 220 is the inner circumference.
\n" ); document.write( "4) Multiply by 2 to give us the number of rupees
\n" ); document.write( "\"2%2A%28%28pi%29%2A%282%2A%28+220%2F%282%28pi%29%29+%2B+7+%29%29%29\"=
\n" ); document.write( "\"4%2A%28pi%29%2A%28+220%2F%282%28pi%29%29+%2B+7+%29\"=
\n" ); document.write( "\"%28+%284%2A%28pi%29%29%2A%28220%2F%282%28pi%29%29%29+%2B+7%2A%284%2A%28pi%29+++%29+%29\"=
\n" ); document.write( "\"%28+%282%29%2A%28220%29+%2B+7%2A%284%2A%28pi%29+++%29+%29\"=
\n" ); document.write( "\"+440+%2B+28%2A%28pi%29+\", the number of rupees
\n" ); document.write( "
\n" );