Like rate, time, and distance questions, work word problems are interested in how long it will take individuals, or workers, to complete a project alone or as a group. The idea here is that it takes a worker a certain amount of time to complete a job. If another worker joins his or her efforts, the job will (theoretically) be completed in less time. The rate of the workers, or their ratios of time it takes to complete a job, are added together and set up in a proportion.