subject
Engineering, 04.05.2021 18:50 Claude7617

Suppose that pedestrians individually (i. e., no groups) arrive to a group of doors according to a deterministic rate of 40 people per minute for the first two minutes; a deterministic rate of 60 people per minute for the next six minutes; and a deterministic rate of 20 people per minute for the following five minutes. After that, there are no arrivals. You may treat this as a D/D/1 queuing system, no matter how many doors are open. a. If only one door is open, what is the queue clearance time?
b. If only one door is open, what is the average delay?
c. What is the minimum number of doors that should be open so that there is no queue at 15 minutes?

ansver
Answers: 2

Another question on Engineering

question
Engineering, 04.07.2019 18:10
Thermal stresses are developed in a metal when its a) initial temperature is changed b) final temperature is changed c) density is changed d) thermal deformation is prevented e) expansion is prevented f) contraction is prevented
Answers: 2
question
Engineering, 04.07.2019 18:10
Which of the following components of a pid controlled accumulates the error over time and responds to system error after the error has been accumulated? a)- proportional b)- derivative c)- integral d)- on/off.
Answers: 2
question
Engineering, 04.07.2019 18:10
Which from the following instrument is commonly used to detect the high pitch butzing sound in bearings? [clo4] a)-digital ultrasonic meter b)-infrared camera c)-spectroscopic d)-vibrometer
Answers: 2
question
Engineering, 04.07.2019 18:20
Athin walled concentric tube exchanger is used to cool engine oil from 160°c to 60°c with water that is available at 25°c acting as a coolant. the oil and water flow rates are each at 2 kg/s, and the diameter of the inner tube is 0.5 m and the corresponding value of the overall heat transfer coefficient is 250 w/m2. oc. how long must the heat exchanger be to accomplish the desired cooling? cpwater=4.187 kj/kg-candcpengine el=2.035 kj/kg·°c, oil . 120]
Answers: 1
You know the right answer?
Suppose that pedestrians individually (i. e., no groups) arrive to a group of doors according to a d...
Questions
question
Engineering, 20.02.2021 20:20
question
Computers and Technology, 20.02.2021 20:20
question
Mathematics, 20.02.2021 20:20
Questions on the website: 13722361