Construction Planning and Management
If the excavation of earth is done manually then it costs Rs. 10 per cum. A machine can excavate at a fixed cost of Rs. 4000 plus a variable cost of Rs. 2 per cum. The quantity of earth for which the cost of excavation by machine will be equal to the cost of manual excavation is

1500 cum
2000 cum
1000 cum
500 cum

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

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Construction Planning and Management
Latest start of an activity is always

less than or equal to latest event time of preceding node
greater than or equal to latest event time of preceding node
equal to latest event time of preceding node
less than latest event time of preceding node

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