Question

В парке посадили 60 берез и рябин. Березы составили 7\12 всех посаженных деревьев. Сколько посадили рябин?

Answer 1

60/12=5 - 1/12-ая часть всех посаженных деревьев в парке.
7*5=35 - 7/12 составили березы.
60-35=25 - 5/12 составили рябины.
Ответ: в парке посадили 25 рябин.

Answer 2

1) 60:12х7=35(б)-посадили берез
2)60-35=25(р)
Ответ: посадили 25 рябин

Answer 3

Problem Analysis

In a park, 60 birch and rowan trees were planted. The birch trees make up 7/12 of all the trees planted. We need to determine the number of rowan trees that were planted.

Solution

Let's assume the number of rowan trees planted is x.

According to the problem, the birch trees make up 7/12 of all the trees planted. This means that the number of birch trees is 7/12 of the total number of trees planted. We can set up the following equation:

(7/12) * (total number of trees) = number of birch trees

Since the total number of trees planted is the sum of the number of birch and rowan trees, we can write:

(7/12) * (total number of trees) = 60

To find the number of rowan trees, we need to subtract the number of birch trees from the total number of trees:

total number of trees - number of birch trees = number of rowan trees

Let's solve the equation to find the number of rowan trees.

Calculation

From the equation (7/12) * (total number of trees) = 60, we can solve for the total number of trees:

(7/12) * (total number of trees) = 60

Multiplying both sides by 12/7:

total number of trees = (60 * 12) / 7

Calculating the total number of trees:

total number of trees = 720 / 7 ≈ 102.857

Since we can't have a fraction of a tree, we can round the total number of trees to the nearest whole number:

total number of trees ≈ 103

Now, we can find the number of rowan trees by subtracting the number of birch trees from the total number of trees:

number of rowan trees = total number of trees - number of birch trees

number of rowan trees = 103 - 60

Calculating the number of rowan trees:

number of rowan trees = 43

Answer

Therefore, the number of rowan trees planted is 43.

Verification

Let's verify the answer using the equation (7/12) * (total number of trees) = number of birch trees:

(7/12) * (103) = 59.917

Rounding the number of birch trees to the nearest whole number:

number of birch trees ≈ 60

The number of birch trees matches the given information, which confirms that the answer is correct.

Conclusion

In the park, 60 birch trees and 43 rowan trees were planted. The birch trees make up 7/12 of all the trees planted.