Question

A rectangular

Answer 1

A = length x width

15,000 = (w + 30) x w
15,000 = $w^{2}$ + 30w
0 = $w^{2}$ + 30w - 15,000

Use quadratic formula to find that  w= -15 + or - 5$\sqrt{609}$. Because distance cannot be negative, the width is -15 + 5$\sqrt{609}$meters or approximately 108.39 meters. This means that the length is approximately 138.39 meters.