I think the final answer would be 314.16 ft squared.This is because if it sprays 20 feet out on each side, the radius would be 20. With a radius of 20, we can solve with the equation A=πr2 to give us the final area of 1256.64 ft squared. It states, however that it only covers 1/4 of the circle, so we can divide 1256.64 by 4 and get the final area of 314.16 ft squared.