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    Exam 7: Rational Expressions and Equations
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Solve the Problem and Answer the Question

Question 169

Question 169

Multiple Choice

Solve the problem and answer the question.
-BJ can overhaul a boat's diesel inboard engine in 15 hours. His apprentice takes 30 hours to do the same job. How long would it take them working together assuming no gain or loss in efficiency?


A) 4 hr
B) 45 hr
C) 10 hr
D) 6 hr

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