To find out how many pages Lionel had copied, we can use the formula:
\[ \text{Total Cost} = \text{Cost per page} \times \text{Number of pages} \]
In this case, the total cost is $20.00 and the cost per page is $0.08. We can set up the equation:
\[ 20.00 = 0.08 \times \text{Number of pages} \]
To find the number of pages, we need to divide the total cost by the cost per page:
\[ \text{Number of pages} = \frac{20.00}{0.08} \]
Calculating that gives:
\[ \text{Number of pages} = \frac{20.00}{0.08} = 250 \]
Thus, Lionel had 250 pages copied.
The answer is 250.