Problema Solution
Martha can rake the leaves in her yard in 6 hours. Her brother can do the job in 2 hours. How long will it take them to do the job working together?
Answer provided by our tutors
Sister rakes at 1/6 yard/hr and the brother 1/2 yard/hr. So working together, it'll take them 1.5 hours or 90 minutes to rake an entire yard.