A uniform border on a framed photograph has the same area as the photograph. What are the outside dimensions of the border if the dimensions of the photograph are 25cm by 20cm?
What would a diagram for this question look?
the attachment shows a diagram.
You can either subtract the photo area from the area inside the outer
perimeter of the frame
or add up the areas inside the border
Hence, you must solve
As this doesn't factorise easily, use
to find x.
You should get a value slightly greater than 4