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Question
In the network shown below the critical path is along
 
A.
1-2-3-4-8-9
B.
1-2-3-5-6-7-8-9
C.
1-2-3-4-7-8-9
D.
1-2-5-6-7-8-9
Answer ( Option B)

1-2-3-5-6-7-8-9

Solution

Therefore critical path 
1-2-3-5-6-7-8-9
and total project duration
= 3 + 4 + 3 + 4 + 6 + 4 = 24

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