A Conical Reservoir (Vertex Down) Having Diameter 10 M and Height

Multiple Choice

A conical reservoir (vertex down) having diameter 10 m and height 10 m is filled with a liquid of density 900 kg/m³. How many kilogram metres of work must be done to pump the liquid out over the top of the tank?

A) 187,500 $\pi$ kg . m
B) 167,500 $\pi$ kg . m
C) 175,000 $\pi$ kg . m
D) 204,000 $\pi$ kg . m
E) 1,837,000 $\pi$ kg . m