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 previous order is being prepared.
At what time is the order placed by Client 3 completely served?
10 : 25
For client 2’s order, it takes 5 minutes to serve completely beginning 10:10. Hence, the client 2 is completely served at 10:15. Now, coming to the client 3’s order of 1 burger and 1 portion of fries, it takes 10 minutes to serve burger while just 5 minutes to serve 1 portion of fries. Hence, he is completely served at 10:25.