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

游客2024-08-08  5

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 now9

选项

答案 21:00

解析 设现在的时间为x,根据题意可得下列方程式:24-(x+2)=1/2[24-(x+1)], 得x=21,所以现在是21:00。
转载请注明原文地址:https://tihaiku.com/zcyy/3711120.html
最新回复(0)