These are the general time allotments that we used at our house when we piloted parts of RTR last year with our oldest son. Since he is an older student as well as a strong reader and writer, he often completed his assignments in less than the allotted time below. However, it's important to note that both he and I are no-nonsense, check-it-off type people purely doing what is in the assignment box and moving on. So, if you add to the discussions or enjoy bunny trails, the times will vary! Also, this year I will be using RTR with my 6th grade son who is very creative and distractible. So, I expect his times to be somewhat longer, especially at first! Anyway, this will give you a guideline as you get underway.
Also, if you are new to our programs, or to a Charlotte-Mason style education, you can expect a training period of about 2-4 weeks at the beginning of the year where your times will be longer and your child will need you more. However, after the training, the time will really fall off of your schedule, once the child gets used to the pacing and design of the guide.
We found this to be very true with both CTC and RTR as we did them with our boys last year, even with our sweet distractible child! 
RTR (Left Side of the Plans):
Reading About History: (30-35 min. including reading and assignment)
Storytime: (15-20 min.)
History Project: (20 min.)
Rotating Box: (20 min.) Longer on the Shakespeare Day
Independent History Study: (10-15 min.) (Longer on Draw and Write days)
RTR (Right Side of the Plans):
Bible Quiet Time: (20 min.)
Math: (30-35 min.)
Science: (25-30 min.)
Rotating Box: Art Appreciation (15-20 min.), Devotional Bible Study (20 min. - twice weekly), Poetry (10-15 min.)
Language Arts (not all areas are done daily):
Dictation (5 min.) 3 times weekly
Medieval History-Based Writing Lessons: (20 min.) 3 times weekly
Drawn into the Heart of Reading: (30-40 min.) 3 times weekly
Grammar: (20 min.) 2 times weekly (much done orally)
Blessings,
Carrie
