Question

У фермера 4 лошади и 9 коров.Лошади требуется на месяц 135 кг сена,а трём коровам столько сена,сколько хватило бы семи лошадям.Сколько кг сена должен расходовать фермер ежемесячно на всех лошадей и коров?

Answer 1

1) 135*7 = 945 (кг) - сена нужно 3 коровам
2) 945*3 = 2835 (кг) - сена нужно 9 коровам
3) 135*4 = 540 (кг) - сена нужно 4 лошадкам
4) 2835 + 540 = 3375 (кг) - сена нужно расходовать фермеру ежемесячно на всех лошадей и коров
Ответ: 3375 кг

Answer 2

Problem Analysis

The farmer has 4 horses and 9 cows. The horses require 135 kg of hay per month, while three cows require the same amount of hay as would be enough for seven horses. We need to calculate how many kilograms of hay the farmer should spend monthly on all the horses and cows.

Solution

Let's break down the problem step by step:

1. Calculate the total amount of hay required for the horses: - The horses require 135 kg of hay per month. - Since the farmer has 4 horses, the total amount of hay required for the horses is 4 horses * 135 kg/horse = 540 kg.

2. Calculate the amount of hay required for three cows, equivalent to the amount required for seven horses: - Let's assume x represents the amount of hay required for one cow. - The amount of hay required for three cows is 3x. - According to the problem, 3x is equivalent to the amount required for seven horses, which is 7 * 135 kg = 945 kg. - Therefore, 3x = 945 kg. - Solving for x, we find that x = 945 kg / 3 = 315 kg. - So, the amount of hay required for one cow is 315 kg.

3. Calculate the total amount of hay required for the cows: - The farmer has 9 cows. - Since each cow requires 315 kg of hay, the total amount of hay required for the cows is 9 cows * 315 kg/cow = 2835 kg.

4. Calculate the total amount of hay required for all the horses and cows: - The total amount of hay required for the horses is 540 kg. - The total amount of hay required for the cows is 2835 kg. - Therefore, the farmer should spend 540 kg + 2835 kg = 3375 kg of hay monthly on all the horses and cows.

Answer

The farmer should spend 3375 kg of hay monthly on all the horses and cows.