Answer: 5 rods can be made, 1.25 inches of rod left over
Explanation: since each rod is 3.75 inches, we can divide 20, our total length, by 3.75, and we get 5.33. That means we can make five full rods, and we have a third of a rod left over. 3.75/3 gets us 1.25, so we know that is our remainder of metal left over.
