Sarthak wants to complete his design project to be able to graduate. He works on
his project 20 minutes every three hours. If
his project requires 10 hours of work, how
long will he take to finish his project?

At the county fair, animals are judged for the quality of their breeding and health. the animal pens are arranged in an array, with one animal in each pen. a barn can hold at most 10 rows of pens and at most 6 pens in each row, with room for people to walk around them. what different ways can the planners of the county fair arrange the pens for the horses and cows in the same barn?