GATE ME 2025 Set 1 — Question 65
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Question
A project involves eight activities with the precedence relationship and duration as shown in the table below. The slack for the activity D is _____ hours (answer in integer).
| Activity | Immediate predecessor | Duration (hours) |
|---|---|---|
| A | - | 4 |
| B | A | 8 |
| C | A | 5 |
| D | B | 2 |
| E | B | 7 |
| F | C | 6 |
| G | D | 3 |
| H | E, F, G | 9 |
Correct answer
2 to 2
Solution
To find the slack for activity D, we perform forward and backward passes on the project network.Forward Pass (Early Start , Early Finish ):
hours.
Alternatively, hours.
- A:
- B:
- C:
- D:
- E:
- F:
- G:
- H:
- H:
- E:
- F:
- G:
- D:
hours.
Alternatively, hours.
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