6.Interfering float is the difference between

7.A father notes that when his teenage daughter uses the telephone, she takes not less than 6 minutes for a call and som? times as much as an hour. Fifteen minutes call are more frequent than calls of any other duration. If these phone calls were an activity in PERT project, then phone calls expected duration will be

8.Critical path

9.Slack time refers to

10.Which of the following excavators is most suitable for digging under water?