Answer:
A) 30 square yards per scoop, 60:2 120:4 180:6 240:8
B) y=x/30, 100 yards by 60 yards is 6,000 square yards. y=6000/30 => y= 20 scoops
C) Because she needs to fill 6,000 square yards. She has already done 4,000 yards in 1 hour that means in half an hour she can do 2,000 yards. So with her remaining 1/2 hour to cover the field she will finish. 4,000 square yards + 2,000 square yards = 6,000 total square yards done. However she will not have anytime left to water them because all of the 1 1/2 hours has passed.
