Waiting for your answers... Answer the following work problem. Report your answers to the nearest tenth of a hour. When David and Petra work together to complete a job it takes them 9 hours. However, when Petra works alone, it takes 6 hours longer than when David works alone.How long would it take David and Petra to do the job if each of them works alone?David's solo rate is hours.Petra's solo rate is hours.
Answer the following work problem. Report your answers to the nearest tenth of a hour.
When David and Petra work together to complete a job it takes them 9 hours. However, when Petra works alone, it takes 6 hours longer than when David works alone.How long would it take David and Petra to do the job if each of them works alone?