Question 1062099
it takes 16 minutes for 9 people to paint 8 walls. how many minutes does it take for 4 people to paint 6 walls? 
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time is directly related to number of walls and indirectly 
related to number of people doing the job.
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t = k*w/p
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Solve for "k" using "16 min for 9 people to paint 8 walls"::
16 = k*8/9
k = 18
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Equation:
t = 18*w/p
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Solve:: minutes for 4 people to paint 6 walls ?
t = 18*6/4
time = 27 minutes
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Cheers,
Stan H.