To solve this you would make a triangle, Assuming you had a piece of paper.
It would look like the picture included (where ever that is) sorry for the horrible drawing with mouse.
You can then you Pythagorean Theorem to solve this

width will be (a)
put in your variables


Subtract 5184 over and get

square root both sides and get
a=54
the field is 54 meters wide
I would say divided p by 2s or what times p=4s
Answer: the answer to this solution is 8.04
A translation
(I'm assuming that this isn't multiple choice since you didn't include the answer choices.)
Answer:
30-5×2 of 3+(19-3) ÷8
Step-by-step explanation:
30-5×6+(19-3)÷8
30-5×6+16÷8
30-30+8
38-30
8