A hemispherical earth mound of 3 meter diameter is proposed to be constructed in a children’s
park. If the proportion of soil and sand for the construction is 3:2, the estimated volume of soil in
cubic meters is ________
Correct answer is between '4.15,4.30'. Can you explain this answer?

Question

A hemispherical earth mound of 3 meter diameter is proposed to be constructed in a children’s
park. If the proportion of soil and sand for the construction is 3:2, the estimated volume of soil in
cubic meters is ________

Correct answer is between '4.15,4.30'. Can you explain this answer?

Answer

's playground. The mound will be made of soil and grass, and will be used for kids to climb and play on. Here are some steps to construct the hemispherical earth mound:

1. Site Preparation: Choose a suitable location in the playground for the mound. Ensure there are no underground utilities or obstacles in the area. Clear any vegetation or debris from the site.

2. Excavation: Excavate the area to create a shallow pit with a diameter of 3 meters and a depth of approximately 1.5 meters. This will serve as the foundation for the mound.

3. Shaping the Mound: Use the excavated soil to shape the mound into a hemisphere. Ensure the soil is evenly spread and compacted to provide stability. Use a measuring tape and level to check the diameter and height of the mound.

4. Grass Seeding: Spread grass seeds evenly over the surface of the mound. Rake the seeds lightly into the soil to ensure good seed-to-soil contact. Water the mound regularly to promote grass growth.

5. Soil Stabilization: To prevent erosion and maintain the shape of the mound, consider using erosion control methods like planting shrubs or installing a geotextile fabric on the slopes of the mound.

6. Safety Features: Install safety features around and on top of the mound to ensure the children's safety. This may include padding, handrails, or a soft landing surface around the base.

7. Maintenance: Regularly monitor the mound for any erosion, grass growth, or safety concerns. Water and fertilize the grass as needed to maintain its health.

It is important to involve professionals, such as landscape architects or civil engineers, for site assessment, design, and construction to ensure safety and structural stability.

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