Question

Садоводы на участке земли площадью 850 гектара посадили 16 деревьев саженцы березы занимают 60% всей площади саженцы тополя 70% остатка саженцы сосны 2/3 нового остатка. Какую площадь занимает фруктовые деревья

Answer 1

Березы занимают 0.6 всей площади. Тополя - 0.7*(1-0.6)=0.28 всей площади. Сосны занимают 2/3*(1-0.28-0.6)=0.08 площади. Таким образом, на фруктовые деревья остается 1-0.08-0.28-0.6=0.04 площади, что равно 850*0.04=34 гектара.
Ответ: 34 га.

Answer 2

Calculation of the Area Occupied by Each Type of Tree

To calculate the area occupied by each type of tree, we need to follow the given information step by step.

1. Total area of the land: 850 hectares.

2. Number of trees planted: 16.

3. Percentage of the area occupied by birch saplings: 60% of the total area.

4. Percentage of the remaining area occupied by poplar saplings: 70% of the remaining area.

5. Percentage of the remaining area occupied by pine saplings: 2/3 of the remaining area.

Now, let's calculate the area occupied by each type of tree.

Area Occupied by Birch Saplings

The birch saplings occupy 60% of the total area. To find the area occupied by birch saplings, we can multiply the total area by 60%:

Area occupied by birch saplings = 850 hectares * 60%

Area Occupied by Poplar Saplings

To find the area occupied by poplar saplings, we need to calculate the remaining area after deducting the area occupied by birch saplings. The remaining area can be calculated by subtracting the area occupied by birch saplings from the total area:

Remaining area = Total area - Area occupied by birch saplings

Then, we can calculate the area occupied by poplar saplings by multiplying the remaining area by 70%:

Area occupied by poplar saplings = Remaining area * 70%

Area Occupied by Pine Saplings

To find the area occupied by pine saplings, we need to calculate the remaining area after deducting the area occupied by birch and poplar saplings. The remaining area can be calculated by subtracting the sum of the areas occupied by birch and poplar saplings from the total area:

Remaining area = Total area - (Area occupied by birch saplings + Area occupied by poplar saplings)

Then, we can calculate the area occupied by pine saplings by multiplying the remaining area by 2/3:

Area occupied by pine saplings = Remaining area * 2/3

Area Occupied by Fruit Trees

To find the area occupied by fruit trees, we need to subtract the sum of the areas occupied by birch, poplar, and pine saplings from the total area:

Area occupied by fruit trees = Total area - (Area occupied by birch saplings + Area occupied by poplar saplings + Area occupied by pine saplings)

Now, let's calculate the areas using the given information.

Calculation:

1. Area occupied by birch saplings: - Area occupied by birch saplings = 850 hectares * 60% = 510 hectares.

2. Area occupied by poplar saplings: - Remaining area = 850 hectares - 510 hectares = 340 hectares. - Area occupied by poplar saplings = 340 hectares * 70% = 238 hectares.

3. Area occupied by pine saplings: - Remaining area = 340 hectares - 238 hectares = 102 hectares. - Area occupied by pine saplings = 102 hectares * 2/3 = 68 hectares.

4. Area occupied by fruit trees: - Area occupied by fruit trees = 850 hectares - (510 hectares + 238 hectares + 68 hectares) = 34 hectares.

Therefore, the fruit trees occupy an area of 34 hectares on the land.

Please note that the calculations are based on the given information and the assumptions made.