What is the least length of a school working day in hours if it can be – McqOptions

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1.	What is the least length of a school working day in hours if it can be split into exact periods of 30 minutes, 40 minutes or 45 minutes?
A.	4 hours
B.	5 hours
C.	6 hours
D.	7 hours
Answer» D. 7 hours

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