Round Off the Time Duration to the the next higher hour no.

[Nevan]

I am a beginner and wanted to make a few custom changes through formula’s and other customisation’s. I need help with the two doubts below. Also take reference from the two photos. 
1. How do I setup the “Hours” formula field such that even if its 10 mins more than a perfect hour it will round it off to 2 hrs and so on for any more amount of time.
2. In the first photo, is it possible for the “End Time” to solely be a time field Instead of Date and Time.
Would be really helpful I could get some solid advice on this!

[TheTimeSavingCo]

re: 1. How do I setup the “Hours” formula field such that even if its 10 mins more than a perfect hour it will round it off to 2 hrs and so on for any more amount of time.

Try:  

ROUNDUP(
  DATETIME_DIFF(
    End,
    Start,
    'minutes'
  ) / 60,
  0
)

 
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re: 2. In the first photo, is it possible for the “End Time” to solely be a time field Instead of Date and Time.

You could probably do something crazy with a single line text field that you input the time into (e.g. 13:30), and then use a formula field to help you calculate stuff; might be more trouble than it's worth though