Slight mistake. If they bowl first and restrict India to 200, they'll need to reach the target in around 31.5 overs. If the target is 251, they'll need to get there in about 33.2 overs.
Target 200 ,they need to Chase in 31.5 over , if target is 251 they need to chase in 32.5 overs.
So look at the difference in 200 or 251 Target it just 1 over difference for 50 run.