Ben o rekile koloi ka $20000 ka 2007. Tlhwatlhwa ya koloi e fokotsega ka seelo se se tlhomameng sa 21% ka ngwaga.  Batla tlwatlhwa ya koloi ka ngwaga wa 2010.

A team of 4 painters worked on a mansion for 3/8ths of a day every day for 3 weeks. How many hours of work did each painter put in?
Tlhwatlhwa ya koloi e fokotsega ka 20000 * 21% = $<<20000*21*.01=4200>>4200 ka ngwaga.
Ben o nnile le koloi eo ka dingwaga di le 2010 - 2007 = <<2010-2007=3>>3.
Tlhwatlhwa ya koloi e fokotsegile ka 4200 * 3 = $<<4200*3=12600>>12600 go tloga ka 2007 go fitlha ka 2010. 
Ka jalo tlwatlhwa ya koloi ka ngwaga wa 2010 ke $20000 - $12600 = $<<20000-12600=7400>>7400.
#### 7400 

There are 24 hours in a day so 3/8ths of a day is (3/8)*24 = <<3/8*24=9>>9 hours
One week has 7 days so 3 weeks have 7*3 = <<7*3=21>>21 days
Each painter put in 9*21 = <<9*21=189>>189 hours of work
#### 189