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The perimeter of the shape is 4 x length, so the original rectangles are 10 cm long.
There is insufficient information to be able to say anything about the width - except that it is less than 10 cm.
L-emental
Age 11 to 14
ShortChallenge Level 
The perimeter of the shape is 4 x length, so the original rectangles are 10 cm long.
There is insufficient information to be able to say anything about the width - except that it is less than 10 cm.
This problem is taken from the UKMT Mathematical Challenges.
You can find more short problems, arranged by curriculum topic, in our short problems collection.
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