It's not just as simple as a target score for Aus to keep Afghanistan to. It also depends on whether Aus can bowl Afghanistan out or not.
It also depends on how many Sri Lanka get (and all of this is predicated on England beating Sri Lanka).
If we assume that England will win by 1 run then their NRR will go up by more if they do this in fewer overs, e.g.
"Sri Lanka score 100 in 20 overs, England score 101 in 12 overs" will result in a greater NRR increase for England than "Sri Lanka score 160 in 20 overs, England score 161 in 20 overs".
Conversely we could win and our NRR could drop, e.g. Sri Lanka are all out for 160 in 10 overs. England knock off 161 in 20 overs.
We'll know a bit more when the Aus v Afghanistan game is done. And we'll know exactly what needs to be done once the first team has batted in the Eng v SL game.
If Afghanistan are kept to 106 or below then we'll know what we need to do in the SL game.
If Afghanistan get to at least 107 then we'll just need to win tomorrow.
It's not just as simple as a target score for Aus to keep Afghanistan to.
It also depends on whether Aus can bowl Afghanistan out or not.It also depends on how many Sri Lanka get (and all of this is predicated on England beating Sri Lanka).
If we assume that England will win by 1 run then their NRR will go up by more if they do this in fewer overs, e.g.
"Sri Lanka score 100 in 20 overs, England score 101 in 12 overs" will result in a greater NRR increase for England than "Sri Lanka score 160 in 20 overs, England score 161 in 20 overs".
Conversely we could win and our NRR could drop, e.g. Sri Lanka are all out for 160 in 10 overs. England knock off 161 in 20 overs.We'll know a bit more when the Aus v Afghanistan game is done. And we'll know exactly what needs to be done once the first team has batted in the Eng v SL game.If Afghanistan are kept to 106 or below then we'll know what we need to do in the SL game.
If Afghanistan get to at least 107 then we'll just need to win tomorrow.
More info on NRR: https://www.espncricinfo.com/ci/content/page/429305.html