00:01
Okay, in this problem they tell us that 20 workers in 40 days can make 2 ,000 meters of a road.
00:17
Okay, so the question is how many workers in half the time, that is, in 20 days, can make half of what was done previously, that is, 1 ,000 meters, and in a terrain whose hardness is twice the previous terrain.
00:41
So, in this case, we consider that we have twice the hardness.
00:51
We have to obtain the number of workers.
00:54
So, what we are going to do first, we can use a formula for the work done.
01:03
So, the work done, we are going to put the label of t, then it would be the number of workers in the working days, we will put d, and the performance per day.
01:22
Now, since the work done in the first scenario is 2 ,000 meters, we can clear the performance per day.
01:29
So, in this case, the performance per day would be the work divided by n by the number of days.
01:36
And now we simply substitute the values.
01:39
The work was 2 ,000 meters.
01:41
The number of initial workers was 20 divided by the number of days, which was 40.
01:48
Now we use the calculator.
01:50
This would be 2 ,000 divided by 20 by 40.
01:55
This would give us 2 .5...