2. 职称英语
  3. If three water pipes A, B and C are working at the same time, they can fill a sw

If three water pipes A, B and C are working at the same time, they can fill a sw

游客2024-01-12  29
问题 If three water pipes A, B and C are working at the same time, they can fill a swimming pool in 6 hours, if only A and B work, it needs 8 hours to fill the swimming pool, in how many hours can C fill the swimming pool alone?
选项 A、22
B、24
C、12
D、21
E、10
答案 B
解析 A、B、C三个水管一起开需要6个小时，A、B一起开需要8个小时，假设C单独工作需要C小时，那么：1/8+1/C=1/6，C=24，选择B。
转载请注明原文地址:http://tihaiku.com/zcyy/3354885.html
相关试题推荐
随机试题
最新回复(0)