Question

If Sam takes 6 hours to paint a house, and Pat takes 12 hours to paint the same house; how long with it take the 2 men to paint the same house together? What is the correct formulary?

Answer 1

In my head: Sam can do two houses in 12 hours, Pat can do one. Toghter, 3 houses in 12 hours, or 4 hours per house..

formulary:
total houses=rate*time
1 house=((1house/6hours) + (1 house/12hours) * time

1 = ((2+1)/12)time

time = 12/3 hours

Answer 2

Thank you