I pretty sure that the answer would be 6 50/117 but if you get a fraction calculator app it can help more.
There are some errors in your table. Column 1, for example, should be all odd numbers. Columns should alternate even/odd.
It can be useful to build a spreadsheet that fills these numbers.
The answer is 22.222222%.
Since we are solving for h, the equation:
V = πr²h
...divides πr² to the other side. Thus, it becomes....

= h
Which can be rewritten as....
h =