CAT 2017 Slot 1 — DILR Question 1
Answer the following question based on the information given below.
Healthy Bites is a fast food joint serving three items: burgers, fries and ice cream. It has two employees Anish and Bani who prepare the items ordered by the clients. Preparation time is 10 minutes for a burger and 2 minutes for an order of ice cream. An employee can prepare only one of these items at a time. The fries are prepared in an automatic fryer which can prepare up to 3 portions of fries at a time, and takes 5 minutes irrespective of the number of portions. The fryer does not need an employee to constantly attend to it, and we can ignore the time taken by an employee to start and stop the fryer; thus an employee can be engaged in preparing other items while the frying is on. However fries cannot be prepared in anticipation of future orders.
Healthy Bites wishes to serve the order as early as possible. The individual items in any order are served as and when ready; however, the order is considered to be completely served only when all the items of that order are served.
The table below gives the orders of three clients and the times at which they placed their orders:
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Assume that only one client’s order can be processed at any given point of time. So, Anish or Bani cannot start preparing a new order while a pervious order is being prepared. At what time is the order placed by Client 1 completely served?
Answer & solution
- A
10 : 17
10 : 10
- C
10 : 15
- D
10 : 20
Now since only one client's order can be processed at any given point of time, the burger preparation for the first client which takes 10 minutes, will get completed by 10 : 10 by one of the 2 employees.
In the meantime, the 1 order of ice-cream will be completed by the 2nd employee in 2 minutes and will be completed by 10 : 02.
One of the 2 employees can put the 3 portions of french fries in the fryer at 10 and will be completed by 10 : 05.
[He can put the fries in fryer and immediately start with either burger or ice-cream]
As can be seen, out of all 3 items, the burger will be the last item to be prepared for the first client and the preparation of that item will be completed by 10 : 10 am.
So the order of the first client will be completed by 10 : 10.
Hence, option (b).