If 3 workers complete a job in 1 hour, how long will it take one worker to do the job? in which problem is the solution most similar to this one? if a child walks for 3 hours and travels 1 mile, how fast is the child walking? if a student earns $3 for working 1 hour, what is the student paid per hour? if a tank is emptied in 1 hour by 3 drains, how long will it take 1 drain to empty the tank? if 3 lemons cost $1, how much does one lemon cost?