Construction of the cattery could be distilled to eight distinct steps, from the official groundbreaking ceremony to the cutting of the litterbox ribbon. The activities, their durations and predecessors are shown in the table below. Use this scenario to answer the following question. $$\begin{array} { | c | c | c | }
\hline \text { Activity } & \text { Predecessors } & \text { Time (weeks) } \
\hline \text { A } & \cdots & 10 \
\hline \text { B } & \text { A } & 8 \
\hline \text { C } & \text { A } & 7 \
\hline \text { D } & \text { C } & 11 \
\hline \text { E } & \text { D } & 12 \
\hline \text { F } & \text { B } & 11 \
\hline \text { G } & \text { E, F } & 6 \
\hline \text { H } & \text { E, F } & 9 \
\hline
\end{array}$$Refer to the scenario above. One activity has identical earliest finish and latest start times. What is the common number for this unusual activity?
A)17
B)18
C)21
D)29

Question

Construction of the cattery could be distilled to eight distinct steps, from the official groundbreaking ceremony to the cutting of the litterbox ribbon. The activities, their durations and predecessors are shown in the table below. Use this scenario to answer the following question. $$\begin{array} { | c | c | c | } 
\hline \text { Activity } & \text { Predecessors } & \text { Time (weeks) } \
\hline \text { A } & \cdots & 10 \
\hline \text { B } & \text { A } & 8 \
\hline \text { C } & \text { A } & 7 \
\hline \text { D } & \text { C } & 11 \
\hline \text { E } & \text { D } & 12 \
\hline \text { F } & \text { B } & 11 \
\hline \text { G } & \text { E, F } & 6 \
\hline \text { H } & \text { E, F } & 9 \
\hline
\end{array}$$Refer to the scenario above. One activity has identical earliest finish and latest start times. What is the common number for this unusual activity?
A)17
B)18
C)21
D)29

Quizplus · Accepted Answer

The activity with identical earliest finish and latest start times is activity G. To find this, we calculate the earliest finish times for all activities and then determine the latest start times for G, considering its dependencies. Activity A starts at week 0 and finishes at week 10. B and C can then start, with B finishing at week 18 and C at week 17. D, depending on C, finishes at week 28, and E, depending on D, finishes at week 40. F, depending on B, finishes at week 29. G and H, depending on E and F, can start no earlier than the latest of their predecessors, which is week 40 for E. Since G takes 6 weeks, it could finish by week 46 if it starts at week 40. Thus, the earliest finish and latest start for G are both at week 40, making the answer 29 weeks into the project.

Construction of the Cattery Could Be Distilled to Eight Distinct