Question: In a certain library the first shelf is 10.0cm off the ground, and the remaining four shelves are each spaced 30.0cm above the previous one.

In a certain library the first shelf is 10.0cm off the ground, and the remaining four shelves are each spaced 30.0cm above the previous one. If the average book has a mass of 1.5 kg with a height of cm, and an average shelf holds 25 books, how much work is required to fill all the shelves, assuming the books are all laying flat on the floor to start?

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