Answer:
10 hours
Step-by-step explanation:
Your Welcome
Yes yes woeoshdenenejdjdjdjejejrjrrjekekekekekeek 30
We can compare by converting Johnny's reading time into the same unit of Jacky's, hours.
There are 60 minutes in an hour, so use this:

15 < 20, so Johnny read faster. This is 5 pages faster per hour than Jacky.
it would be covered by tuesday: because if it doubles each day and it is half full on monday it would be double that so it would be 100% 4/4 covered
Answer:
no lo entiendo lo que escribiste