Multiple Choice
Solve the problem.
-BJ can overhaul a boat's diesel inboard engine in 30 hours. His apprentice takes 60 hours to do the same job. How long would it take them working together assuming no gain or loss in efficiency?
A) 12 hr
B) 90 hr
C) 20 hr
D) 8 hr
Correct Answer:
Verified
Correct Answer:
Verified
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