Construction Planning and Management
During the construction period, price variation clause in contracts caters to

Variation in total cost of the project on an ad hoc basis
Variation in cost in materials element, labour element and petrol-oil-lubricant element
Increase in rates of only important materials
Rate of inflation

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Construction Planning and Management
If the optimistic time, most likely time and pessimistic time for activity A are 4, 6 and 8 respectively and for activity B are 5, 5.5 and 9 respectively, then

None of these
expected time of activity A is greater than the expected time of activity B
expected time of both activities A and B are same
expected time of activity B is greater than the expected time of activity A

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