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A homeowner must pick between paint A, which costs $6 per [#permalink]
19 Apr 2010, 12:59
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A homeowner must pick between paint A, which costs $6 per liter, and paint B, which costs $4.50 per liter. Paint B takes one-third longer to apply than paint A. If the homeowner must pay the cost of labor at the rate of $36 per hour, which of the two paints will be cheaper to apply?
(1) The ratio of the area covered by one liter of paint A to the area covered by paint B is 4:3.
(2) Paint A will require 40 liters of paint and 100 hours of labor.
I've read it more than a few times. Here is the explanation verbatim:
"To make an intelligent decision, we need to know which requires more paint and how much more, how long each will take, and we need some information on the labor costs. Statement (1) gives us information on which requires more paint; however, we still need the actual amount, the number of hours, and the labor costs.
Statement (2) tells us the amount of one paint and the amount of labor; we can find from the question stem the amount of labor needed for the other paint, but we still don't know how much labor costs, or how much of paint B is needed. Using both statement together, we still cannot find the labor costs. Both statements together are insufficient."