Mr. Sahoo attended a 1-day workshop from 09:15 to half past five in the evening. The workshop included a \[\text{1}\frac{1}{4}\] hour lunch break, two 15 minutes tea breaks and 13 activities, each of equal duration. Calculate the duration of each activity.

• A.  30 minutes
• B.  20 minutes
• C.  25 minutes
• D.  40 minutes