Answer:
Given: Depth of the swimming pool = 5 feet
Swimming pool is in shape of cuboid
volume of swimming pool = 1200 feet³
Volume of Swimming pool = Area of Base × Height
1200 = Base Area × 5
Base Area = 240 feet²
So, the possible dimension of the rectangle that represent the swimming pool are l = 24 & b = 10 , l = 30 & b = 8 , etc
Figure is attached with one of dimension.