My teacher gave us a problem to find the density of an object that weighs 40 lbs. and has a volume of 120 cubic inches. I think the answer is .33 lbs. per cubic inch, my teacher said it is 3.3 and some of my classmates said it was something way different. In my teachers defense he is a mechanic, not a physicist, trying to teach an Aviation Maintenance Tech. program. He gets a lot of stuff wrong and the students have to keep correcting him, but he could fix anything on an aircraft. Please help me and explain the your process! Thank you!