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题目内容
Two librarians, Robert and Patricia,cataloged a combined total of 180 new books,each of which was cataloged by only one of the two librarians. Although they spent the same amount of time cataloging their books, Robert spent an average of 15 minutes per book whereas Patricia spent an average of 12 minutes per book.
Quantity A
The number of books cataloged by Robert
Quantity B
60
A显示答案
· 相关考点
1.7.1 公倍数与最小公倍数
以上解析由 考满分老师提供。