super confused, don't need the answer, just need some guidance

Question

anonymous · Answer

The figure below shows two similar pictures that Sheila wants to frame:

Two similar rectangles, one larger than the other. The width of the larger one is 37.5 inches. The length is not shown. The length of the smaller one is 32 inches and the width is 25 inches.

Sheila has 3 strips of unfinished molding that she wants to use to frame the two pictures. Each strip is 36 inches long.

Assuming there is no wastage or overlap of molding, what is the minimum length of molding, in inches, Sheila still requires to frame both the pictures? Show your work and explain your reasoning in complete sentences.

anonymous · Answer

http://learn.flvs.net/webdav/assessment_images/educator_geometry/v15/module04/image0024e4d5a26.jpg

zpupster · Answer

|dw:1412178537944:dw|

since they are similar we can set up a ratio

L1/w1=L2/w2

L1/37.5=32/25  we can multiply both ides by 37.5

L1 = (37.5*32)/25

L1= ??

anonymous · Answer

48?

zpupster · Answer

so now you can figure out the perimeters of both rectangles
and figure out how much stripping she will need

anonymous · Answer

awesome thank you!

zpupster · Answer

you are welcome