Hey guys - I have a question about a problem I gave on a recent Algebra test and wondering if anyone can fill me in on the (probably obvious) reason why this won't work. Question: Evaluate V=1/3lwh for l=12in., w=6in., and h=10ft. When making the key, I solved it this way: I changed the height to 120 inches, so I'm multiplying by the same term in inches. So I had 1/3(12)(6)(120). I took 1/3 of 12, which is 4, so my new problem was (4)(6)(120) which equals 2880 inches cubed. I then divided that by 12 to get feet and ended up with 240 ft. cubed. Is this correct? It's cubed, so I shouldn't have divided by 12, right? I had a student answer 5/3 on the test and she claimed she was correct because this is what she did: She changed all the terms to feet. So 1/3(1)(.5)(10) = 5/3ft. cubed. Logically, when I look at it, her answer seems more correct, but I can't figure out why both ways didn't yield the same answer. I know I should know this, but there's so many other things going on in my head right now and I can't seem to figure it out. Help!!