Question 887628
i believe your answer is 150.8


at full pressure, it sprays 8 feet out so 8 is your radius and the area covered is 8^2 * pi = 64 * pi.


at half pressure, it sprays 4 feet out so 4 is your radius and the area covered is 4^2 * pi = 16 * pi.


the difference in the area covered is 64 * pi - 16 * pi = 48 * pi.


48 * pi = 150.7964... which rounds to 150.8.