A Cylindrical Tank 8 M in Diameter and 8 M $\pi$

A cylindrical tank 8 m in diameter and 8 m high, with axis vertical, has 6 m of water in it. How many kilogram metres of work must be done to pump half the water in the tank to a height of 8 m above the top of the tank? (1 m³ of water weighs 1,000 kg.)

A) 648,000 $\pi$ kg . m
B) 552,000 $\pi$ kg . m
C) 432,000 $\pi$ kg . m
D) 496,000 $\pi$ kg . m
E) 5,409 600 $\pi$ kg . m