document.write( "Question 622305: The perimeter of a rectangle is 38 inches, and the area is 90 square inches. Find the dimensions of the rectangle. \n" ); document.write( "
Algebra.Com's Answer #391286 by Emsley(35)![]() ![]() ![]() You can put this solution on YOUR website! Let length =x and breadth=y \n" ); document.write( "Then xy=90 and 2x+2y=38 so x+y=19 \n" ); document.write( "x=90/y Sub in x+y=19 and get 90/y+y=19 \n" ); document.write( "Multiply both sides by y 90+y^2=19y y^2-19y+90=0 \n" ); document.write( "Factorising (y-10)(y-9)=0 so y=10 or 9 \n" ); document.write( "But y was the breadth so y=9 and x=10 \n" ); document.write( "That is length =10 and breadth=9 \n" ); document.write( " \n" ); document.write( " |