Question 1017683
It takes 4 hours for 3 members of Jo's crew to paint the walls of a square room with a side length of 12ft and a 10ft ceiling. How long would it take a crew of five to paint the walls of a square room with a side length of 25ft and a 12ft ceiling? (Assume there are no windows and they paint over doors, etc) 
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time is directly related to area and inversely related to crew size
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t = k*a/c
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Solve for "k" using "It takes 4 hours for 3 members of Jo's crew to paint the walls of a square room with a side length of 12ft and a 10ft ceiling"
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4 = k*(4*12*10)/3
k = 1/40
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Equation:
t = a/(40c)
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How long would it take a crew of five to paint the walls of a square room with a side length of 25ft and a 12ft ceiling?
t = (4*23*12)/(40*5)
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time = 5.52 hrs = 5hrs 31min 12sec
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Cheers,
Stan H.