## Task 1 - 080511

On a large construction site, three excavators are in use. At a constant performance, they transport a total of $90 \mathrm{~m}^{3}$ of earth in 20 minutes. For the operation of these three excavators, a team of six workers is required. We assume that instead of these three excavators, six earth workers would have to perform this task.

How many workdays would they need at the earliest to excavate $90 \mathrm{~m}^{3}$ of earth if each earth worker moves an average of $5 \mathrm{~m}^{3}$ of earth per workday?
If 6 earthworkers dig out $5 \mathrm{~m}^{3}$ of earth each day, they manage $30 \mathrm{~m}^{3}$ per day. Thus, they need 3 days for $90 \mathrm{~m}^{3}$.