Jamir and his two friends Sarah and Julien, go to their school's swimming pool to swim. Jamir swims 20 more meters per day than Sarah, who swims twice the distance Julien swims. They go to the swimming pool the whole week, swimming the same distances as before. If Julien swam 50 meters, what's the combined distance for three of them for the whole week?
If Julien swam for the whole week, then the total distance in meters that he covered is 50*7 = <<50*7=350>>350 meters
Sarah swam twice the distance covered by Julien, which is 2*50 = <<2*50=100>>100 meters
Sarah's total for the whole week is 100*7 = <<100*7=700>>700 meters
If Jamir swam 20 meters more than Sarah, he covered 100+20 = <<20+100=120>>120 meters
Jamir's total for the whole week is 120*7 = <<120*7=840>>840 meters
The combined distance for all of them is 840+700+350 = <<840+700+350=1890>>1890 meters
#### 1890