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Time calculation

Question asked by emilio_speciale on Nov 14, 2011
Latest reply on Nov 14, 2011 by RayCologon

I have a very easy question.

I have three time fields indicating how long an exam in three parts last:

Exam 01 (for instance it lasts 30 minutes: 00:30:00)

Exam 02 (for instance it lasts 15 minutes: 00:15:00)

Exam 03 (for instance it lasts 20 minutes: 00:20:00)


i want to have another time field that calculates these three time fields. How do I get the result (65 minutes or 01:05:00)?
Please help

Thank you