document.write( "Question 415063: The length of a rectangular field is twice its breadth. A girl jogged around it 5 times and covered a distance of 3km. What is the length of the field? \n" ); document.write( "
Algebra.Com's Answer #291063 by mananth(16946)\"\" \"About 
You can put this solution on YOUR website!
breadth = x
\n" ); document.write( "length = 2x
\n" ); document.write( "..
\n" ); document.write( "perimeter = 2*(L+B)
\n" ); document.write( "=2(2x+x)
\n" ); document.write( "=6x
\n" ); document.write( "6x= 3/5
\n" ); document.write( "6x*5=3
\n" ); document.write( "30x=3
\n" ); document.write( "x=1/10 km = 100 m
\n" ); document.write( "Length = 100*2=200 m
\n" ); document.write( "...
\n" ); document.write( "(100+100+200+200)* 5 = 3000 m= 3km
\n" ); document.write( "
\n" );