Let w represents the weight and d represents the distance.
It is given that
The weight needed to balance a lever varies inversely with the distance from the fulcrum to the weight. A 120-lb weight is placed on a lever, 5 ft from the fulcrum.

Substituting the values of w and d, we will get

Using the value of k which is 600, with the above equation and the given value of d which is 8, we will get

Therefore the correct option is B .