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单选题
A 10-gallon bucket loses 2 gallons of water every 10 minutes. How many minutes will it take a fu U bucket to empty completely?
A
20
B
22
C
40
D
50
E
100
参考答案
参考解析
解析：
根据题干，假设x分钟后，桶会变空。所以可得出2÷10=10÷x，x＝50。
根据题干，假设x分钟后，桶会变空。所以可得出2÷10=10÷x，x＝50。
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