Carly, Brittany, and Lauren streamed one fourth of an eight episode documentary. If 70 minutes of the documentary have been watched how many minutes are in the documentary?
If one-fourth of the documentary is 70 minutes then one episode is 70*4 = <<70*4=280>>280 minutes.
Since there are 8 episodes in the documentary, the documentary is 280*8=<<280*8=2240>>2240 minutes. Answer: \boxed{2240}.