Total no. of overs=50
Now a batsman can score a maximum of 6 runs in each ball. But if a batsman scores 6 in the last ball then the strike gets changed and the other batsman faces the ball. So the maximum run in the last ball can be 3. So in every over a batsman can score 33 runs. So in 49 overs the total score can be 49*33=1617.In the last over he can score 36 runs because now there is no need to change strike .So in the last over the maximum runs can be 36. Therefore the total score will be 1617+36=1653.