Question

Три землекопа за 2 часа выкопали 6м. канавы. За какое время 7 землекопов выкопают 28 м канавы?

Answer 1

3 землекопа=2часа=6 метров
3 землекопа=1час=3 метра
1землекоп=1час=1 метр
7 землекопов=1 час=7 метров
7 землекопов=?=28 метров
7землекопов за 4 часа выкопают 28 м 

Answer 2

Calculating the Time Required to Dig a Trench

To solve this problem, we can use the concept of "work done" and "time taken."

Given: - 3 workers can dig a 6m trench in 2 hours.

We can calculate the work done by the 3 workers in 2 hours: - Work done by 3 workers in 2 hours = 6m

Now, we need to find out how long it will take 7 workers to dig a 28m trench.

Using the concept of "work done" and "time taken," we can set up a proportion to find the time required for 7 workers to dig a 28m trench.

Let's calculate the time required for 7 workers to dig a 28m trench.

Calculation

We can use the formula: Work = Rate × Time

For 3 workers: - Work = 6m - Time = 2 hours - Rate = Work / Time = 6m / 2 hours = 3m/hour

Now, for 7 workers: - Work = 28m - Rate = 3m/hour (as calculated above)

Let's calculate the time required for 7 workers to dig a 28m trench using the formula: Time = Work / Rate

Answer

Time required for 7 workers to dig a 28m trench = 28m / 3m/hour = 9.33 hours

So, it will take approximately 9.33 hours for 7 workers to dig a 28m trench.