An artist spends 30 hours every week painting. If it takes her 3 hours to complete a painting, how many paintings can she make in four weeks?
She completes 30 hours/week / 3 hours/painting = <<30/3=10>>10 paintings/week
So in one month, she paints 10 paintings/week * 4 weeks/month = <<10*4=40>>40 paintings
#### 40