Answer:
B
Step-by-step explanation:
Found this when I was doing my own work, hope this helps.
The Answer would be x=72. Why? Because

is your %. You Cross multiply 240 * 30 = 100x
240 time 30 = 7200. you want x to be alone so you do 7200 divided by 100 equaling 72. So you get x=72.
16,896 feet is the distance

Solution ~
or it can also be expressed as ~