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

游客2024-08-11  14

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?

选项

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。
转载请注明原文地址:https://tihaiku.com/zcyy/3714876.html
最新回复(0)