To calculate the total gravel needed:
\[ \text{Total Gravel Needed} = \frac{\text{Length} \times \text{Width} \times \left( \frac{\text{Depth}}{12} \right)}{27} \]
Where:
Gravel coverage refers to the amount of gravel needed to cover a specific area to a certain depth. It is commonly used in landscaping, construction, and gardening projects[^1^][^2^].
Let's assume the following values:
Using the formula:
\[ \text{Total Gravel Needed} = \frac{20 \times 10 \times \left( \frac{3}{12} \right)}{27} \approx 0.22 \text{ cubic yards} \]
The total gravel needed is approximately 0.22 cubic yards.