Answer: 135921 kilograms of water are needed to fill the pool.
Explanation:
The formula for determining the volume of the rectangular pool is expressed as
Volume = length × width × height
The swimming pool has average dimensions of 40. feet by 20. feet by 6.0 feet. This means that the volume of the pool is
Volume = 40 × 20 × 6 = 4800 cubic feet.
1 cubic feet = 28316.847 millilitres
4800 cubic feet = 4800 × 28316.847
= 135920865.6 millilitres
Given the density of water is 1.0 g/mL, the weight of 135920865.6 millilitres of water would be
1 × 135920865.6 = 135920865.6 g
1000g = 1 kilogram
135920865.6g = 135920865.6/1000
= 135921 kg