Answer:
4.8 hours or 4 hours 48 minutes
Explanation:
Since there are 24 hours in a day and this is to be split among the 5 knights, it means that the time each knight spend on guard duty in one day will be equivalent to the result of the division of the total number of hours by the number of knights
= 24 hours / 5 knights
= 4 .8 hours
This may further be expressed as 4 hours 48 minutes.