One type of lubricating oil weighs approximately 52 pounds per cubic foot, or 7 pounds per gallon. A 42-gallon barrel will hold approximately how many cubic feet of such oil?
5.7
6.0
7.4
10.8
29.5
tell me if I'm doing this wrong.
7 pounds per gallon = 52 pounds per cubic foot.
42 gallons = 294 pounds and also = 2184 pounds per cubic foot....
I figured they got 6.0 as their answer by dividing 42 by 7, but that doesn't seem like the right answer in light of the given information, unless somewhere when they were talking about cubic feet they meant cubic inches...
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