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Order the steps: a time and work question

Exercise and reference answers

Steps
  1. Note that the job to be done is fixed
  2. Multiply the known workers by the known days to get the constant
  3. Write the new number of workers times the unknown days
  4. Set that equal to the same constant
  5. Divide to find the days needed

Explanation

Treat it as an inverse proportion and the arithmetic falls out. Source: syllabus Maths, Ch 11 Direct and Inverse Proportions.
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