| Giver | Post | Date |
| Sakshi516B | Two machines, Y and Z, work at constant rates producing identical item | 01-Sep-2021 |
| Gmat20201 | Two machines, Y and Z, work at constant rates producing identical item | 15-Sep-2020 |
| RAHUL_GMAT | Two machines, Y and Z, work at constant rates producing identical item | 08-Aug-2020 |
| olygmat | Two machines, Y and Z, work at constant rates producing identical item | 30-May-2020 |
| sunita123 | Two machines, Y and Z, work at constant rates producing identical item | 04-Jan-2020 |
| debasmita.acharya | Two machines, Y and Z, work at constant rates producing identical item | 26-Mar-2017 |