Answer: There is average number of paged he read each hour is 15 pages per hour.
Explanation:
Since we have given that
Number of pages of a book = 90
Number of hours he reads = 6 hours
As we know the formula for average number of paged he read each hour.
Average number of paged is given by
![\frac{\text{Number of pages}}{\text{Number of hours}}\\\\=(90)/(6)\\\\=15](https://img.qammunity.org/2019/formulas/mathematics/middle-school/c4pzaxjzzucuogohc4f6w6alr6w32miz0n.png)
Hence, there is average number of paged he read each hour is 15 pages per hour.