document.write( "Question 967755: the length of a rectangle is four times its width. if the area of the rectangle is 400 m2 find the perimeter \n" ); document.write( "

Algebra.Com's Answer #591503 by satyareddy22(84) $\"\"$ $\"About$

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Let l be length,b be the breadth.
\n" ); document.write( "l=4b (given)
\n" ); document.write( "Area = 400 m2
\n" ); document.write( "But area of rectangle = l * b
\n" ); document.write( "l * b = 400
\n" ); document.write( "(4b)b=400
\n" ); document.write( "4b^2=400
\n" ); document.write( "b^2=400/4=100
\n" ); document.write( "b=sq(100)=10
\n" ); document.write( "b=10
\n" ); document.write( "l=4b=4(10)=40
\n" ); document.write( "l=40
\n" ); document.write( "Perimeter = 2(l+b)=2(10+40)=2(50)=100 \n" ); document.write( "

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