Brian awakens suddenly, feeling unbelievable thirsty. It's mid-afternoon now, and his face is badly sunburned. He wonders whether the lake water is safe to drink, and he thinks briefly of the dead pilot.
Yeah what is the question than i could answer it?
Answer:

Explanation:
Given

Required
How long to fly 
Represent the required parameter with x
i.e.

Recall that

So: we have:


Cross Multiply



Hence;
<em>It'll take the butterfly </em>
<em> </em><em>in a mile</em>
I am doing the same thing. I HAVE NO IDEA WHAT I AM DOING!!!