Here is the exact problem:

**Lawn Sprinkler: **A lawn sprinkler is constructed in such a way that $\displaystyle \frac{dy}{dt}$ is constant, where y ranges between 45(degrees) and 135(degrees). The distance the water travels horizontally is:

x = (V^2 sin(2y))/32

where v is the speed of the water. Find $\displaystyle \frac {dx}{dt}$ and explain why the water does not water evenly. What part of the lawn receives the most water?

Here is the image.

If anyone could walk me through this, that would be awesome!