Question
If Oscar and Rael work together, they can complete a job in 15 days. If Oscar and Rael worked together for 10 days, followed by Rael who worked alone for the next 20 days, they can finish off the job.
  1. How many days would Rael need to complete the job alone? 
  2. How many days would Oscar need to complete the job alone?
4 m
(a)

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(b)

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If Oscar and Rael work together, they can complete a job in 15 days. If Oscar and Rael worked together for 10 days, followed by Rael who worked alone for the next 20 days, they can finish off the job.
  1. How many days would Rael need to complete the job alone? 
  2. How many days would Oscar need to complete the job alone?