Question

Журавль стоит на двух ногах. А цапля — на одной ноге. Лягушка, сидя в болоте, насчитала 18 ног. Известно, что на болоте журавлей и цапель всего 11.

Answer 1

Ответ:

Пошаговое объяснение:

Журавль = на 2 ногах

Цапля = на 1 ноге

Журавль = х штук

Цапля = у штук

х + у = 11

2х + у = 18

х = 11 - у

2х + у = 18

1)

2х + у = 18

2(11 - у) + у = 18

22 - 2у + у = 18

-2у + у = 18 - 22

-у = -4

у = 4

2)

х = 11 - у

х = 11 - 4

х = 7

Журавль = (х) = 7 штук

Цапля = (у) = 4

7 + 4 = 11 (птиц) - всего

7*2 + 4*1 = 14 + 4 = 18 (ног) - всего

Answer 2

Ответ:

Здесь можно просто подбором

Пошаговое объяснение:

Так как журавль стоит на двух ногах, то число ног при одних журавлях будет чётное, то есть цапель можно перебирать по 2.

2 * 1 + 9 * 2 = 20 ног, не подходит

4 * 1 + 7 * 2 = 18 ног, подходит

Тогда 4 цапли и 7 журавлей

Answer 3

The Riddle of the Crane, Heron, and Frog

The riddle states that a crane stands on two legs, while a heron stands on one leg. Additionally, a frog sitting in a swamp counts a total of 18 legs. It is also known that there are a total of 11 cranes and herons in the swamp.

To solve this riddle, we need to determine the number of legs each animal has.

Solving the Riddle

Let's assume that the number of cranes in the swamp is represented by 'C' and the number of herons is represented by 'H'.

According to the information given, we know that: - A crane stands on two legs. - A heron stands on one leg. - A frog sitting in the swamp counts a total of 18 legs. - The total number of cranes and herons in the swamp is 11.

Based on this information, we can set up the following equations:

Equation 1: 2C + H = 18 (since the total number of legs counted by the frog is 18) Equation 2: C + H = 11 (since the total number of cranes and herons is 11)

To solve these equations, we can use a method called substitution.

From Equation 2, we can express H in terms of C: H = 11 - C

Substituting this value of H into Equation 1, we get: 2C + (11 - C) = 18 C + 11 = 18 C = 18 - 11 C = 7

Now that we have the value of C, we can substitute it back into Equation 2 to find the value of H: 7 + H = 11 H = 11 - 7 H = 4

Therefore, there are 7 cranes and 4 herons in the swamp.

Conclusion

In conclusion, the riddle states that there are 7 cranes and 4 herons in the swamp. The crane stands on two legs, while the heron stands on one leg. The frog sitting in the swamp counts a total of 18 legs. This riddle can be solved by setting up equations based on the given information and using substitution to find the values of C (number of cranes) and H (number of herons)