My Can Volume and SA Cale

Today my group and i helped each other by helping eacher measuring the radius and the height of our chocie Can. I was able to accomplish, finishing both of my tables in class. I didn't learned any skills but i did practive a skill that i haven't proctive in a long time. I don't know how i well use these skills outside of school, but i do know that i will use it throughtout bu PBAT. A question that i have about what i have accomplish well be why is it that my measurments only changed from 8.2 to 8.1 when it came to finding the diameter and from 3.2 to 3.1 when i found the height ?