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

admin2016-12-08  35

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://kaotiyun.com/show/DZAK777K
0

最新回复(0)