To Maintain Proper Humidity, a Crawl Space That Is $x$ Metres By

Short Answer

To maintain proper humidity, a crawl space that is $x$ metres by $2 x$ metres should have $\frac{2}{27} x^{2}(900)+$ $60[2(2 x)+2 x] \mathrm{cm}^{2}$ of ventillation. Simplify this expression. (Use fractions for the coefficients, if necessary.)