Final answer:
To find the number of pages Sydney can read per minute, divide the total number of pages by the total minutes. Sydney's reading rate is 1.25 pages per minute.
Step-by-step explanation:
The question asks to calculate the rate at which Sydney reads pages per minute.
Given that Sydney read 50 pages in 40 minutes, we can find the number of pages she can read per minute by dividing the total number of pages by the total number of minutes.
The rate or reading speed is therefore 50 pages ÷ 40 minutes = 1.25 pages per minute.