# Circumference 9211

The rectangle has a circumference of 30 cm, and its width is 3 cm shorter than its length. What is its area?

## Correct answer:

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### You need to know the following knowledge to solve this word math problem:

**algebra**- equation
- system of equations
- expression of a variable from the formula
**planimetrics**- area of a shape
- perimeter
- rectangle

### Units of physical quantities:

### Grade of the word problem:

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