Problema Solution
The frame around a rectangular picture has a uniform width. The dimensions of the picture are 5 in. by 7 in. If the combined area of the picture and the frame is 80 in.2, what is the width of the frame?
Answer provided by our tutors
Let w represent the uniform width of the frame, w>0
The area of the picture without the frame is: 5*7
The area of the picture with the frame is: (5 + w)(7 + w)
(5 + w)(7 + w) = 70
........
........
w = 2.43 in
The width of the frame is 2.43 inches.