To solve this, we need to determine two unit rates:

1. Pages per hour:
   • Leo reads 10 pages in $\frac{1}{3}$ hour.
   • To find the number of pages he reads in 1 hour, divide 10 pages by $\frac{1}{3}$ hour:

$\text{Pages per hour} = \frac{10 \, \text{pages}}{\frac{1}{3} \, \text{hour}} = 10 \times 3 = 30 \, \text{pages per hour}$

2. Hours per page:
   • To find the time Leo spends on 1 page, divide $\frac{1}{3}$ hour by 10 pages:

$\text{Hours per page} = \frac{\frac{1}{3} \, \text{hour}}{10 \, \text{pages}} = \frac{1}{30} \, \text{hours per page}$

Final Answers:

• Pages per hour: 30 pages per hour
• Hours per page: $\frac{1}{30}$ hours per page

Would you like more details or clarifications on any part of this? Here are some related questions:

1. If Leo reads for 2 hours, how many pages will he have read?
2. How long will it take Leo to read 90 pages?
3. What is the time in minutes per page?
4. If Leo speeds up and reads 40 pages per hour, what is his new hours-per-page rate?
5. How many pages does Leo read in 45 minutes?

Tip: Unit rates simplify complex ratios into an easy-to-understand form, useful for making comparisons or predictions!