Herman is building a picnic table for a campground. the picnic table is 5feet 10inches long. herman built the picnic table in 2 days. the first day he worked for 3 hours 45 min. the second day he worked for 2 hours 10 min long. how long did it take to build the table.

The question gives you unneeded information to confuse you: the length of the table. Just ignore that for this question.

To figure out how long he worked, add the time he spent each day on the table.
He spent 3 hours and 45 minutes the first day and 2 hours and 10 minutes the second day

3 hours + 2 hours = 5 hours
45 minutes + 10 minutes = 55 minutes

Herman spent 5 hours and 55 minutes to build the table.