A farmer has 450 m of fencing to enclose a rectangular area and divide it into two sections as shown. Write an equation to express the total area enclosed as a function of the width.

Question

$\begin{array}{1 1} (a)\; \frac{2}{3} y^2-150y \\ (b)\; 150y-\frac{2}{3}y^2 \\ (c)\; \frac{2}{3} y^2 + 150y \\ (d)\; \frac{3}{2} y^2+150y \end{array}$