Help needed with a mathproblem (first post so I don't know where to post it)

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PaniniBaguett
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http://liggandestolen.files.wordpress.com/2012/01/kvadrat5.jpg?w=450

The AREA of the square in the link above is 49m^2 and consists of, as you can see, 4 rectangles and 1 square. If the red rectangle has a circumference of 16m, what's the circumference of the green rectangle?

Maybe I should add that the 4 rectangles are not of the same size and you can not measure in the picture to get to the right answer.

//PaniniBaguetten :)
 
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I've reported this post, so it should be sent to the appropriate section soon. In the meantime, let's take a look...

Well, you have that the square is 49 m^2, which means that each side of the square is 7 m. We also know that the perimeter of the red rectangle is 16 m. What do you think you can imply from those two bits of data?