Answer:
option 1
Step-by-step explanation:
40ft is radius
first lets find the area of the whole circle
A=pi*r^2
A=pi*40^2
A=pi*1600
A=5026.54824574 ft^2
now, lets find what part of a circle is 80 degrees
80/360=2/9
now lets multiply the total area by the fraction to find what area is actually getting sprinkled
A=5026.54824574*(2/9)
A=10053.0964915/9
A=1117.01072128
A= around 1117.01 ft^2
