Question

Учащиеся 3 х школ посадили деревья первая школа посадила 2/5вторая 6/25 всех деревьев вопрос сколько дерев посадила 3 школа если известно что первая школа посадила 100 деревьев

Answer 1

1) Первая посадила 2/5 от всех деревьев = 100
Всего
100 : (2/5) = 250  деревьев всего.
2) Вторая посадила 6/25
250 * 6/25 = 60 деревьев
3) Осталось для третьей.
250 - 100 - 60 = 90 шт.. - ОТВЕТ

Answer 2

Calculating the Number of Trees Planted by the Third School

To calculate the number of trees planted by the third school, we can follow these steps:

1. Calculate the total number of trees planted by the first and second schools: - The first school planted 2/5 of the total trees. - The second school planted 6/25 of the total trees. - We can find the total number of trees planted by adding these fractions together.

2. Determine the number of trees planted by the third school: - Once we have the total number of trees planted by the first two schools, we can subtract this from the total number of trees to find out how many trees the third school planted.

Let's proceed with the calculations.

Calculation

1. Total number of trees planted by the first and second schools: - The first school planted 2/5 of the total trees. - The second school planted 6/25 of the total trees.

The total number of trees planted by the first two schools can be calculated as follows: ``` Total trees planted = (2/5 + 6/25) * Total trees ```

Let's calculate the total number of trees planted by the first two schools using the given information that the first school planted 100 trees.

First, we need to find a common denominator for 5 and 25, which is 25. Then we can convert the fractions to have the same denominator: ``` 2/5 = 10/25 6/25 = 6/25 ```

Now we can add the fractions: ``` Total trees planted = (10/25 + 6/25) * Total trees = 16/25 * Total trees ```

Using the information that the first school planted 100 trees, we can solve for the total number of trees: ``` 16/25 * Total trees = 100 Total trees = 100 * 25 / 16 = 156.25 ```

Therefore, the total number of trees planted by the first two schools is approximately 156.25.

2. Number of trees planted by the third school: - Now that we know the total number of trees planted by the first two schools, we can find out how many trees the third school planted by subtracting this total from the overall number of trees.

   Trees planted by the third school = Total trees - Trees planted by the first two schools
                                    = Total trees - 156.25
   

Given that the first school planted 100 trees, we can use this information to calculate the number of trees planted by the third school.

Conclusion

Based on the calculations, the number of trees planted by the third school can be determined by subtracting the total number of trees planted by the first two schools from the overall number of trees.