Figure 2 shows an elevated and asymmetrical seesaw, formed by a uniform beam (mass 54 kg, length 6 m). The pivot of the seesaw is at point A, 2 m from the left edge of the beam (labelled D). A 25 kg child positions herself at point B, 3 m to the right of the pivot. Her carer, whose mass is 75 kg, positions himself at point C a distanced(to be determined) from the pivot, as shown below.

Figure 2?The seesaw (not drawn to scale)