题目信息
Working alone, pump A can empty a pool in 3 hours. Working alone, pump B can empty the same pool in 2 hours. Working together, how many minutes will it take pump A and pump B to empty the pool?
A:72
B:75
C:84
D:96
E:108
参考答案及共享解析

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已选答案:
正确答案:
A:72
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题目来源
Magoosh