Supermarket cashiers

When only two checkouts are open in a supermarket, people wait in line for an average of 12 minutes. How much will the average waiting time in line be reduced if they open three more ticket offices?

Correct answer:

x =  7.2 min

Step-by-step explanation:

2:(2+3) = d:12  d=12 2+32=524=4.8 min  x=12d=12524=512 5524=560524=56024=536=536 min=7.2 min



Did you find an error or inaccuracy? Feel free to write us. Thank you!







Tips for related online calculators
Check out our ratio calculator.
Do you want to convert velocity (speed) units?
Do you want to convert time units like minutes to seconds?

You need to know the following knowledge to solve this word math problem:

Related math problems and questions: