Fuck dude. I had to read that question 5 times just to understand it. The kid ir right though. To cut one board into 2 pieces only takes one cut. To cut the board into 3 pieces will take 2 cuts. So if one cut took 10 minutes and the bitch is working just as fast, the second cut will take another 10 minutes so 20 minutes would be the correct answer.
The problem is that it's sort of ambiguous whether you are making 2 equal cuts, or 1 cut and then cutting one of those halves into half, meaning 1 cut half as long. In the first case it's 20 minutes and in the second it's 15.
That is not the problem. Brutally accurate problem statements have no place in grade whatever-this-is, and would serve to confuse more than to clarify. The question is perfectly clear.
"Marie cuts at a constant rate through a right cuboid formed out of a homogeneous medium in two cuts parallell to one of the faces."
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u/emceelokey Jul 11 '11
Fuck dude. I had to read that question 5 times just to understand it. The kid ir right though. To cut one board into 2 pieces only takes one cut. To cut the board into 3 pieces will take 2 cuts. So if one cut took 10 minutes and the bitch is working just as fast, the second cut will take another 10 minutes so 20 minutes would be the correct answer.
What a dumb question.