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Answer:

18 centimeters.

Step-by-step explanation:

You have to multiply 27 by 2 = 54

Then 90 - 54 = 36

Then 36/2 = 18

The width is 18 centimeters.

Hope this helps ya!!

Answer:
18

Explanation:
27 x 2 = 54
90 - 54 = 36
36 / 2 = 18