the time (t) that it takes to paint a house varies directly with the sizes of the house (s) in square meters and inversely with the number of painters (p) working on the job. if four painters can complete a 424 m2 house in 6 days, then how long will it take 9 painters to complete a 477 m2 house
Answers & Comments
If you want the house to be painted in 18/27 = 2/3 the time, and the time varies inversely with the number of painters, you'd need 3/2 as many painters. 6 × 3/2 = 9 painters would get the job done in 18 hours.