What is the formula for calculating the volume of a kidney-shaped pool in gallons?

The formula for calculating the volume of a kidney-shaped pool takes into account its dimensions to estimate how much water it can hold. For this specific shape, the formula uses the average width and average depth multiplied by the length, with a factor that adjusts the calculation for the pool’s irregular shape.

In this instance, choosing to multiply by 7.0 is appropriate because it is a conversion factor that translates cubic feet into gallons (one cubic foot contains approximately 7.48 gallons, but for a kidney-shaped pool, a more suitable factor is used to account for its shape). The factor is slightly adjusted to accommodate the less straightforward geometry of the pool, thus making the volume estimate more accurate.

Using the other options would not provide the proper calculation for a kidney-shaped pool. For instance, multiplying by a factor of 6.7 or simply adding average depth wouldn't accurately capture the volume due to the unique shape of the pool. Additionally, using 7.48 as a multiplier alone oversimplifies the geometry of the kidney shape without factoring in the nuances that the specific shape requires.