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SJM created the topic: Excercise 4.18 - Question 7
I believe the working-out answer for Exercise 4.18 Question 7 (Answer on page 129) has a typo.
Note: The actual answer is correct, however the "Burn 6 gal at 17.2 gph = 31 min" should read "Burn 9 gal at 17.2 gph = 31 min"