rate word problem

[Guest]

6 people takes 23min to paint 4 walls.
Formula to find how many minutes it for 1 person to paint all 4walls. Thanks for you help.

[Guest]

Assuming that all 6 people work at the same rate, if it takes 6 people 23 minutes to do a job then it would take one of them 6*23= 138 minutes or 2 hours and 18 minutes to do the job.