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Fifty math books are arranged in a rectangular parallelepiped with a length of 18 cm, a width of 13 cm and a height of 25 cm. What is the average volume of each book?
The idea of solving the problem is that 18, 13, 25 is the stack length of 50 books, and we can find out his volume. 18 times 13 times 25 to get the total volume of 50 books. Divide the total volume into 50 parts and divide by 50 to get a single volume.