document.write( "Question 877404: A rectangle has a perimeter of 140cm. The length of the rectangle is three times the width. Find the difference between the length and the width. \n" ); document.write( "
Algebra.Com's Answer #529323 by dkppathak(439)\"\" \"About 
You can put this solution on YOUR website!
A rectangle has a perimeter of 140cm. The length of the rectangle is three times the width. Find the difference between the length and the width.
\n" ); document.write( "perimeter of rectangle =2(l+b) =140
\n" ); document.write( "(l+b) = 70
\n" ); document.write( "as per given condition l=3b by substituting
\n" ); document.write( "3b +b =70
\n" ); document.write( "4b =70
\n" ); document.write( "b=70/4
\n" ); document.write( "b= 17.5
\n" ); document.write( "L= 3x17.5 =52.5
\n" ); document.write( "l-b= 35 answer
\n" ); document.write( "
\n" );