最新提问
我的动态
登录后查看动态
题目内容
Working alone at its constant rate, machine A produces k liters of a chemical in 10 minutes.
Working alone at its constant rate, machine B produces k liters of the chemical in 15 minutes.
How many minutes does it take machines A and B, working simultaneously at their respective constant rates, to produce k liters of the chemical?_____minutes
Working alone at its constant rate, machine B produces k liters of the chemical in 15 minutes.
How many minutes does it take machines A and B, working simultaneously at their respective constant rates, to produce k liters of the chemical?_____minutes
6 显示答案
以上解析由 考满分老师提供。