A fast-food restaurant has one drive-through window.An average of 40 customers per hour arrive at the window.It takes an average of 1 minute to serve a customer. Assumethat interarrival and service times are exponential.a On the average, how many customers are waiting inline?b On the average, how long does a customer spend atthe restaurant (from time of arrival to time service iscompleted)?c What fraction of the time are more than 3 cars waitingfor service (this includes the car (if any) at the window)?
Unitary Method
The word “unitary” comes from the word “unit”, which means a single and complete entity. In this method, we find the value of a unit product from the given number of products, and then we solve for the other number of products.
Speed, Time, and Distance
Imagine you and 3 of your friends are planning to go to the playground at 6 in the evening. Your house is one mile away from the playground and one of your friends named Jim must start at 5 pm to reach the playground by walk. The other two friends are 3 miles away.
Profit and Loss
The amount earned or lost on the sale of one or more items is referred to as the profit or loss on that item.
Units and Measurements
Measurements and comparisons are the foundation of science and engineering. We, therefore, need rules that tell us how things are measured and compared. For these measurements and comparisons, we perform certain experiments, and we will need the experiments to set up the devices.
A fast-food restaurant has one drive-through window.
An average of 40 customers per hour arrive at the window.
It takes an average of 1 minute to serve a customer. Assume
that interarrival and service times are exponential.
a On the average, how many customers are waiting in
line?
b On the average, how long does a customer spend at
the restaurant (from time of arrival to time service is
completed)?
c What fraction of the time are more than 3 cars waiting
for service (this includes the car (if any) at the window)?
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