How much water will an 18 foot pool by 4 feet deep hold?

To calculate the amount of water an 18-foot by 4-foot deep pool can hold, we can use the formula for the volume of a rectangular prism:

Volume = Length × Width × Height

In this case, the length is 18 feet, the width is 4 feet, and the height is 4 feet.

So, the volume of the pool is:

Volume = 18 ft × 4 ft × 4 ft = 288 cubic feet

Since 1 cubic foot of water is equal to 7.48 gallons, we can convert the volume of the pool to gallons by multiplying by 7.48:

Volume in gallons = 288 cubic feet × 7.48 gallons/cubic foot = 2160.64 gallons

Therefore, an 18-foot by 4-foot deep pool can hold approximately 2161 gallons of water.