The table below shows the number of books read by five children in one month.
| Name | Number of books |
|---|
| Sanjana | ? |
| Gautam | 21 |
| Gauri | 11 |
| Shilpa | 20 |
| Ridhima | 20 |
If Sanjana read 3 books more than
of the total number of books read by the other four children, then how many books did Sanjana read in a month?