Question

Детскую площадку и зону барбекю планируют покрыть речным песком слоем 10 см. Сколько тонн речного песка необходимо заказать? Указание. Считайте, что π = 3,14.

Answer 1

Ответ:

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Пошаговое объяснение:

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Answer 2

Calculation of the Amount of River Sand Needed

To calculate the amount of river sand needed to cover a playground and barbecue area with a 10 cm layer, we need to know the dimensions of the area. Without the dimensions, it is not possible to provide an accurate answer. Could you please provide the length and width of the playground and barbecue area?

Once we have the dimensions, we can calculate the volume of sand required by multiplying the area by the thickness of the sand layer. The formula for calculating the volume is:

Volume = Area × Thickness

After obtaining the volume, we can convert it to the weight of sand by multiplying it by the density of river sand. The density of river sand can vary, but for the purpose of this calculation, we will assume a density of 1.6 tons per cubic meter.

Let's assume the dimensions of the playground and barbecue area are 10 meters by 5 meters. Using these dimensions, we can calculate the amount of river sand needed.

Calculation Example

Given: - Length of the area = 10 meters - Width of the area = 5 meters - Thickness of the sand layer = 10 cm = 0.1 meters - Density of river sand = 1.6 tons per cubic meter

1. Calculate the area: - Area = Length × Width = 10 meters × 5 meters = 50 square meters

2. Calculate the volume: - Volume = Area × Thickness = 50 square meters × 0.1 meters = 5 cubic meters

3. Convert the volume to weight: - Weight = Volume × Density = 5 cubic meters × 1.6 tons per cubic meter = 8 tons

Therefore, if the dimensions of the playground and barbecue area are 10 meters by 5 meters, you would need to order approximately 8 tons of river sand to cover the area with a 10 cm layer.

Please note that this calculation is based on the assumptions provided. If the actual dimensions or density of the river sand differ, the amount of sand needed may vary.