In addition to Cao Chong's method of weighing the elephant, there are three other ways to weigh the elephant:
1, let the elephant on the boat to mark, and then change the stone to adult, and then add the weight of each person, you can know the weight of the elephant.
2, make an elephant carpeting board, using the lever principle, let the elephant stand on one end, the other end of the human, such as the weight of the elephant at the same time, and then the weight of the human, you can calculate the weight of the elephant.
3, fill the pool with water, drive the elephant into the pool, and then drive out, calculate the weight of the water overflow, is the weight of the elephant.