Because the width is 3/8 of the perimeter of the rectangle and is equal to 33 cm, then the perimeter will be:
33: 3/8 = 33 * 8/3 = 88 cm.
The perimeter of the rectangle is found by the formula:
P = 2 * (a + b).
Substituting all known data into the formula presented above, we get:
88 = 2 * (33 + b).
Now we solve the resulting equation:
33 + b = 44;
b = 44-33;
b = 11.
Answer: the length of the rectangle is 11 cm.
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