Certified Pool Operator Practice Test

Based on the dimensions provided, the pool has a volume of (40 x 20) x (8-3) = 40 x 20 x 5 = 4,000 cubic feet. To convert cubic feet to gallons, multiply the volume by 7.48 (1 cubic foot = 7.48 gallons). Therefore, the total number of gallons is 4,000 x 7.48 = 29,920 gallons. Option B is incorrect because it seems to have miscalculated the volume by using the depth of 8 feet instead of the difference between 8 feet and 3 feet. Option C is incorrect because it seems to have miscalculated the volume by using the dimensions of the pool as 40 feet by 20 feet by 8 feet. Option D is incorrect because it seems to have miscalculated the volume by using the depth of 8 feet instead of the difference between 8 feet and 3 feet and also by using the dimensions as 40 feet by 20 feet by 8 feet.