题目信息
Machine A can make 350 widgets in 1 hour, and machine B can make 250 widgets in 1 hour. If both machines work together, how much time will it take them to make a total of 1000 widgets?
A:1 hour and 20 minutes
B:1 hour and 24 minutes
C:1 hour and 30 minutes
D:1 hour and 36 minutes
E:1 hour and 40 minutes
参考答案及共享解析

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正确答案:
E:1 hour and 40 minutes
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题目来源
Magoosh