Thread: Help with diagram

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?

Originally Posted by sinjid9

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?

Hi sinjid9,

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