The rest of the book had to be finished in the next five days, so he had to read 170 pages in total.
I have already read 45 pages, so I need to read 125 pages a day (170 pages/5 days).
Therefore, he read an average of 125 pages a day.
Xiao Hong had already read 80 pages. The remaining pages were 200 - 80 = 120 pages. In order to finish reading the remaining 120 pages in six days, Little...