'will last approximately' is correct and usable in written English.
You can use it to describe a duration of time that is approximate. For example, "This project will last approximately six months."
This appointment will last approximately 3 hours.
The second appointment will last approximately 3 hours.
The first appointment will last approximately 3 hours.
The first appointment will last approximately 3 hours, and the second appointment will last approximately 3.5 hours.
The tour costs $90 a person, and will last approximately an hour.
The exam will last approximately 30 minutes and count for 5% of the student's Departmental GPA.
The layout is as follows: · The forum will last approximately 90 minutes.
All sessions will take place at various locations around the Morningside Heights campus and will last approximately 90 minutes.
Dell estimates the XPS 13 with the infinity screen will last approximately 11 hours of browsing or eight hours of video playback.
Al-Husseini believes that what will result is a plateau in total output that will last approximately 15 years, followed by decreasing output.
Hence, running our algorithm alone on this test device will last approximately 11 h.
