Tony and Ericka are given a cylinder. The cylinders are the same. They use their rulers to take measurements and use that information to calculate the volume of the cylinder, using 3.14 for pi. Tony says the height of the cylinder is 7 and the diameter of the cylinder is 3 and he calculates the volume by multiplying 3.14 by 7 by 1.5 by 1.5 to get 49.455 Ericka says the height of the cylinder is 17.78 and the diameter of the cylinder is 7.62 and she calculates the volume by multiplying 3.14 by 17.78 by 3.81 by 3.81 to get 810.42225012 Tony and Ericka have different answers for the same cylinder and they are both correct! Please, tell me - how is that possible