Problem C

Dollhouse

The first level of a dollhouse is in the shape of a rectangle. Its floor plan is shown in the following diagram.

Both the mudroom and the kitchen are square with areas of \(400\text{ cm}^2\) and \(2500\text{ cm}^2\), respectively. The living room is rectangular with an area of \(3000\text{ cm}^2\).

Determine the area of the rectangular storage room.

**Themes: **Geometry & Measurement, Number Sense