alleryTasks P and Q take 4 and 6 h and can run together; R takes 3 h after both. Minimum total?
A9 h
B8 h
C7 h
D13 h
Answer & Solution
Correct answer: A. 9 h
Running P and Q together takes 6 hours, followed by R's 3 hours, totaling 9 hours.
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