[unparseable or potentially dangerous latex formula] and [unparseable or potentially dangerous latex formula] and [unparseable or potentially dangerous latex formula]
#23 state 2006
And a problem i made up because i can't find a test , where i saw a similer question
We have 5 people who can paint one wall in 4 hours, if two people who work the same rate as the other paint two walls how long would it take?