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19. If X is the time difference between the earliest and latest times that an activity...


19. If X is the time difference between the earliest and latest times that an activity can be done and Y is the time it takes
19. If X is the time difference between the earliest and latest times that an activity can be done and Y is the time it takes to do the activity. What is the time X - Y for the activity? (Place answer on 'answer sheet) 20. Determining the schedule of a project begins by examining each activity in the to determine its relationship to the other activities. (Place answer on answer sheet)
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Answering the first Question i.e. 19.

19.

For the given activity, every activity have tow parameters whose are

deadline - d

execution time - e

arrival time - a

For the activity,

Earliest time for the activity is = a + d

Latest time of the activity = a + e

X

= difference of the earliest stime - lastest time

= d - e

Y is defined as the time it takes to do an activity which is equal to the execution time -  arrival time  i.e a -  e

X - Y = d - e - a +  e = d - a

This is equal to the response time of the activity.

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