Hi.
Thank you for your question.
The problem tells you the total miles (50) that a herd can move in one day.
However, the problem wants to know how many miles this herd could move in one hour.
Since there are 24 hours in a day, it takes 24 hours for the elephant herd to move 50 miles.
You therefore need to take the 50 miles and divide it by the number of hours in a day, to get the number of miles for one hour.
50miles/24hours
*(Because of the numbers given in the problem, the number doesn't divide evenly and will include a decimal. If the actual figures from the math problem divide out to a decimal, always double check if they want you to round to a certain value.)
So, in this case:
50miles/24hours=2.08333333333miles/hour
I hope this helps with this problem, and similar ones in the future.
Have a great night!