Anni is an experienced barista who can make a coffee in #20# #s#. Connie is a beginner, so each coffee takes her a minute. On a busy day, how many coffees can they make in total in half an hour, working as fast as they can?
1 Answer
Aug 10, 2017
Together they can make 4 coffees per minute: Connie makes 1 and Anni makes 3. In 30 minutes they can make
