An excavator can dig a ditch 20 m long in 1 hour. One ditch was dug in 10 hours, and the other in 20 hours.
| January 4, 2021 | education
An excavator can dig a ditch 20 m long in 1 hour. One ditch was dug in 10 hours, and the other in 20 hours. How long was the ditch dug during this time?
In the initial data for this assignment, it is reported that within one hour the excavator can dig a ditch with a length equal to two tens of meters.
Since in ten hours of work an excavator can dig a ditch ten times longer than in one hour, then the length of a ditch dug in ten hours of work is 20 * 10 = 200 m.
Since in two dozen hours of operation an excavator can dig a ditch 20 times longer than in one hour, the length of a ditch dug in two dozen hours of work is 20 * 20 = 400 m.
Consequently, during this time a ditch 200 + 400 = 600 m long was dug.
Answer: 600 m.
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