A Pivot Is Placed Under a Massless 100-Cm Pole at 50

Multiple Choice

A pivot is placed under a massless 100-cm pole at 50 cm from the ends.A 4-kg mass is hung 15 cm from the left end and a 3-kg mass is hung 45 cm from the left end.If the stick is to remain in rotational equilibrium,how far from the left end of the pole must a third 8-kg mass have be hung?

A) 19.4 cm
B) 24.4 cm
C) 30.6 cm
D) 69.4 cm
E) 74.4 cm