If it were two hours later, it would be half as long until midnight as it would

游客2024-08-11  11

问题 If it were two hours later, it would be half as long until midnight as it would be if it were an hour later. What time is it now?

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答案 21:00

解析 设现在时间为x,根据题中的时间倍数关系,可列出2×[24一(x+2)]=24-(x+1),解得x=21,所以时间是21点。
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