Question

1200 Aspen trees are to be planted near one shoreline along a strip 35 feet wide by 1100 feet long. What spacing will you use?

Answer 1

Let's denote the width of one tree planting area as x, the length as y. Thus there should be 35/x trees along the width and 1100/y trees along the length of the shoreline. We get the following expression:
35/x * 1100/y = 1200;
xy = 32.083 ft2
x = 32.083/y.