| Draw a bar model: Daughter = 1 unit, Joe = 2 units, Son = 1 unit + 19. | ||
| Total = 4 units + 19 = 363. |
| Total in units | = | 1 + 2 + 1 = 4 units + 19 = 363 |
| 4 units | = | 363 - 19 = 344 |
| 1 unit (daughter) | = | 344 รท 4 = 86 cm |
| Son = 1 unit + 19 | = | 86 + 19 = 105 cm = 1 m 5 cm |