SOLUTION
The rate at wihich the cartons are packed per hours is
Then we find the rate at which each of the worked per hour.
The number of carton joe parcked=6
The ime taken by Joe =2 hours
Hence
Joe packed 3 cartons per hour
Similarly,
The number of carton Bob packed =17
The time taken by Bob =6 hours
hence
hence
Bob packed 2.83 cartons per hour
Hence
Comparing the number of carton packed per hour by both individuals,
Joe packed the most carton per hour