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#29340 Bangla Language & Literature Time and Work Level 0

One worker can do a job in n hours, while it takes a second worker m hours to do the same job. How long does it take both workers?

  1. A (m + n)/mn
  2. B 1/m + 1/n
  3. C m + n
  4. D mn/(m + n)
Answer: D - mn/(m + n)

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