Respuesta :
The video will end at 4.20 PM (4.50 - 30 mins). So it starts at 3.15 PM and ends at 4.20 PM. So it is 1 hour and 5 minutes.
Answer:1 hr and 25 minutes
Step-by-step explanation:add 3:15 with 30 min to get 3:45 then add 4:50 with 30 minutes to get 5:20
Hopefully this helps ^_^ part c is longer then 6:30