Construction Planning and Management
A contractor has two options;(l) : Invest his money in project A or (II) : Invest his money in project B. If he decides to invest in A, for every rupee invested, he is assured of doubling his money in ten years. If he decides to invest in B, he is assured of making his money 1.5 times in 5 years. If the contractor values his money at 10% interest rate, he

should invest in neither of the two projects
should invest in project B
should invest in project A
could invest in either of the two projects

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Construction Planning and Management
Free float is mainly used to

Identify the activities which can be delayed without affecting the total float of preceding activity
Identify the activities which can be delayed without affecting the total float of either the preceding or succeeding activities
Establish priorities
Identify the activities, which can be delayed without affecting the total float of succeeding activity

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Construction Planning and Management
Total float for any activity is defined as the difference between

Its latest start time and earliest finish time
Its earliest finish time and earliest start time for its successor activity
Its latest finish time and earliest start time for its successor activity
Its latest start time and earliest start time

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