Company Es well has a pumpjack with a 2 1/4-inch pump rod and is running an 86-inch stroke. If the jack pumps 2562 barrels of oil over a one-week period (7 days), at what speed (in strokes per minute) is it operating. Choose the closest answer. a.9 SPM b. 12 SPM c. 15 SPM d. 18 SPM

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