A conical reservoir has an altitude of 3.6 m and its upper base radius is 1.2 m. If it is filled with a liquid of unit weight 9.4 kN/m^3 to a depth of 2.7 m, find the work done in pumping the liquid to 1.0 above the top of the tank. (Please use formula > Wf = γf hTVf
a. 55.41 kJ
b. 41.55 kJ
c. 45.15 kJ
d. 51.45 kJ