Sari has to read a book for english class by the end of the week. she wants to read 200 pages in the first 5 days of the week. on average, how many pages a day should sari per day to reach her goal?

The number of pages she should read in a week should be the proper and even distribution of the total number of pages to the number of days. Mathematically, that is,
                     pages per day = 200 pages / 5 days = 40 pages / day
Thus, Sari should read 40 pages per day in order for her to reach her goal. 

Just tell koda to adjust the number of shapes himself.