Examveda

Assertion (A): Activity 57 is critical.
Reason (R): Earliest finish time and latest finish time for events 57 are same

A. A is correct but R is not correct

B. R is correct but A is not correct

C. Both A and R is correct

D. Both A and R is incorrect

Answer: Option A


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Comments (1)

  1. Mahesh Pawar
    Mahesh Pawar:
    1 year ago

    Critical Activity: In project scheduling, a critical activity is an activity that has no slack time. Slack time is the amount of time an activity can be delayed without delaying the entire project. If the earliest finish time and the latest finish time of an activity are the same, it means there is no slack time for that activity, making it critical.
    Therefore, both Assertion (A) and Reason (R) are correct, and Reason (R) is the correct explanation for Assertion (A).

Related Questions on Construction Planning and Management

If to, tp and tm are the optimistic, pessimistic and most likely time estimates of an activity respectively, the expected time t of the activity will be

A. $$\frac{{{{\text{t}}_{\text{o}}} + 3{{\text{t}}_{\text{m}}} + {{\text{t}}_{\text{p}}}}}{2}$$

B. $$\frac{{{{\text{t}}_{\text{o}}} + 3{{\text{t}}_{\text{m}}} + {{\text{t}}_{\text{p}}}}}{3}$$

C. $$\frac{{{{\text{t}}_{\text{o}}} + 4{{\text{t}}_{\text{m}}} + {{\text{t}}_{\text{p}}}}}{4}$$

D. $$\frac{{{{\text{t}}_{\text{o}}} + 4{{\text{t}}_{\text{m}}} + {{\text{t}}_{\text{p}}}}}{5}$$

E. $$\frac{{{{\text{t}}_{\text{o}}} + 4{{\text{t}}_{\text{m}}} + {{\text{t}}_{\text{p}}}}}{6}$$