Question

Во дворе куры и ягнята.Ягнят в 3 раза меньше,чем кур. Количество ног кур и ягнчт равно 40 . Сколько кур и сколько ягнятиво дворе?

Answer 1

16 куриц - 32 ноги, 2 ягненка- 8 ног.

Answer 2

1)4+2+2+2=10(ног)-одна пара(ягненок, и 3 курицы(ведь куриц в 3 раза больше))
2)40:10=4(пары)-всего
т.е., 4 ягненка (1×4), 12 куриц (3×4).

Answer 3

Solution:

To solve this problem, we can use a system of equations to represent the given information and then solve for the number of chickens (куры) and lambs (ягнята).

Let's denote: - x as the number of chickens (куры). - y as the number of lambs (ягнята).

We are given the following information: 1. The number of lambs is three times less than the number of chickens: y = 3x. 2. The total number of legs of chickens and lambs is 40: 2x + 4y = 40 (since chickens have 2 legs and lambs have 4 legs).

Solution Steps:

1. Express the number of lambs in terms of the number of chickens using the given relationship: y = 3x. 2. Substitute the expression for y into the equation representing the total number of legs to solve for x. 3. Once we find the value of x, we can then find the value of y using the relationship y = 3x.

Let's proceed with the calculations.

Calculation:

1. Using the relationship y = 3x, we can substitute this into the equation 2x + 4y = 40: 2x + 4(3x) = 40 2x + 12x = 40 14x = 40 x = 40 / 14 x = 20 / 7

2. Now that we have the value of x, we can find the value of y using the relationship y = 3x: y = 3 * (20 / 7) y = 60 / 7

Answer:

So, the number of chickens (куры) is approximately 20/7 (or 2.86 when rounded to two decimal places), and the number of lambs (ягнята) is approximately 60/7 (or 8.57 when rounded to two decimal places).

Therefore, there are approximately 2.86 chickens and 8.57 lambs in the yard.