If there is a book, then Zhang Ming's counting speed is eight books per hour.

Let Li Qiang's speed be X, then a/2 is the rest of the books. Their combined speed is x+a/8, and they calculated 65,438+0 hours. So a/2=(x+a/8)* 1, so x=3a/8.

Then the time for one person to finish in Li Qiang is the total number divided by the speed, that is, a/(3a/8)=8/3=2 hours and 40 minutes.