Question

5 землекопов за 5 часов выкапывают 5 метров канавы.Сколько землекопов за 100 часов выкопают 100 метров канавы.Внимание!! Задача не такая простая, как кажется на первый взгляд

Answer 1

5м/5ч=1м в час 

1м/5=100см/5=20см - 1 землекоп в час

100м/0,2м=500./100=5

Ответ: 5 землекопов 

Answer 2

Problem Analysis

We are given that 5 earth diggers can dig a 5-meter trench in 5 hours. We need to determine how many earth diggers are needed to dig a 100-meter trench in 100 hours.

Solution

To solve this problem, we can use the concept of work. The work done by the earth diggers is directly proportional to the number of diggers, the distance they dig, and the time it takes. Therefore, we can set up a proportion to solve for the unknown number of earth diggers.

Let's denote the unknown number of earth diggers as x.

According to the given information, we have the following proportion:

5 diggers : 5 meters :: x diggers : 100 meters

Using the concept of proportions, we can cross-multiply and solve for x:

5 diggers * 100 meters = 5 meters * x diggers

Simplifying the equation:

500 = 5x

Dividing both sides of the equation by 5:

100 = x

Therefore, we need 100 earth diggers to dig a 100-meter trench in 100 hours.

Answer

To dig a 100-meter trench in 100 hours, we would need 100 earth diggers.