Question

Решите задачу!!!На лугу трава растёт одинаково густо , 40 коров съедают всю траву за 60 ч , 30 коров за 100 часов .Сколько коров съедят эту траву за 300 часов? 100баллов за правильный ответ!

Answer 1

1.40+60=100
.2.100-30=70 3.300-100=200

Answer 2

30 : 100 = 0,3 ( кол-во травы съедаемое за 1 ч)
0,3 * 300 = 90 
Ответ: 90??

Answer 3

Problem Analysis

We are given that 40 cows can eat all the grass on a meadow in 60 hours, and 30 cows can eat all the grass in 100 hours. We need to find out how many cows can eat all the grass in 300 hours.

Solution

Let's assume that x cows can eat all the grass in 300 hours. We can set up the following proportion:

40 cows : 60 hours = x cows : 300 hours

To solve for x, we can cross-multiply and solve for x:

40 * 300 = 60 * x

12000 = 60x

x = 12000 / 60

x = 200

Therefore, 200 cows can eat all the grass in 300 hours.

Answer

200 cows will eat all the grass in 300 hours.