Hannah, a hurdler, slept 8 hours 30 minutes on Monday night.
She slept 7 hours on both Tuesday and Friday night.
She slept 6 hours 20 minutes on Wednesday night.
She got up at 6:30 am on Thursday.
How much sleep did she get in the 3 nights before Thursday's meet?
First we added up all the hours and minutes .Then we added up all the numbers and got 21 hours and 51 minites.
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