That was the CCNA class hours or course hours. For that you'll have to contact the school you are planning on taking the course. Generally they are 5 day courses. So since CCNP requires 3 exams it would be around 5 days X 3. Now each day would be around 8 hours approximately so 40 X 3. But then again it would all depend on the school you are planning on taking the course at.