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In a project with tasks P, Q, R, S, and T, if P must be completed before Q and R

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Question: In a project with tasks P, Q, R, S, and T, if P must be completed before Q and R, and R must be completed before S, which of the following is a valid conclusion?

Options:

  1. S can start before P.
  2. Q can start after R.
  3. R can start after P.
  4. T must be completed before P.

Correct Answer: R can start after P.

Solution: 

R can start after P is completed, as per the given constraints.

In a project with tasks P, Q, R, S, and T, if P must be completed before Q and R

Practice Questions

Q1
In a project with tasks P, Q, R, S, and T, if P must be completed before Q and R, and R must be completed before S, which of the following is a valid conclusion?
  1. S can start before P.
  2. Q can start after R.
  3. R can start after P.
  4. T must be completed before P.

Questions & Step-by-Step Solutions

In a project with tasks P, Q, R, S, and T, if P must be completed before Q and R, and R must be completed before S, which of the following is a valid conclusion?
  • Step 1: Identify the tasks involved: P, Q, R, S, and T.
  • Step 2: Understand the constraints: P must be completed before Q and R.
  • Step 3: Note that R must be completed before S.
  • Step 4: Since P must be done first, R can only start after P is finished.
  • Step 5: Therefore, R can start after P is completed, which is a valid conclusion.
  • Task Dependency – Understanding the order in which tasks must be completed based on given constraints.
  • Critical Path Method – Identifying the sequence of tasks that determines the minimum project duration.
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