document.write( "Question 257447: Sirs/Madams,\r
\n" );
document.write( "\n" );
document.write( "Kindly help my son in solving one item in his assignment. He was able to solve the other items except for this one. We will greatly appreciate your help.\r
\n" );
document.write( "\n" );
document.write( "\"The Length of a picture is four/thirds (4/3) times its Width. It is placed in a picture frame of uniform width of 2 centimeters. If the area of the frame is 100 square centimeters, what are the dimensions of the picture?\"\r
\n" );
document.write( "\n" );
document.write( "Thank you very much for your help. \n" );
document.write( "
Algebra.Com's Answer #189342 by jsmallt9(3758)![]() ![]() ![]() You can put this solution on YOUR website! Let x = the width of the picture. \n" ); document.write( "Then, since the length is 4/3 of the width, the length of the picture is \n" ); document.write( "Let's look at a picture of the situation: \n" ); document.write( " \n" ); document.write( "The inner rectangle is the picture. \n" ); document.write( "The four outer rectangles make up the frame. The two larger rectangles, top and bottom, have a length of 2 + x + 2 or x+4 and a width of 2. The area of each is (x+4)2 = 2x+8. \n" ); document.write( "The two smaller rectangles on the sides have a length of 4x/3 and a width of 2. The area of each is 4x/3*2 = 8x/3. \n" ); document.write( "The combined areas of the four rectangles is 2x+8 + 2x+8 + 8x/3 + 8x/3 = 4x+16+16x/3. We are told that the area of the frame is 100 square centimeters. So \n" ); document.write( " \n" ); document.write( "We can use Algebra to solve this. We'll start by eliminating the fraction by multiplying both sides by 3: \n" ); document.write( " \n" ); document.write( "which simplifies to: \n" ); document.write( " \n" ); document.write( "Subtracting 48 from each side we get: \n" ); document.write( " \n" ); document.write( "Dividing both sides by 28 we get: \n" ); document.write( " \n" ); document.write( "Since x is the width of the picture the width is 9 centimeters. The length picture is 4x/3 = 4(9)/3 = 12 centimeters. \n" ); document.write( " |