The mass of a spaceship is $$1000$$ kg. It is to be launched from the earth's surface out into free space. The value of $$'g'$$ and $$'R'$$ (radius of earth) are $$10\ m/s^2$$ and $$6400$$ km respectively. The required energy for this work will be:

A

$$6.4 \times 10^{11}$$ Joules

B

$$6.4 \times 10^{8}$$ Joules

C

$$6.4 \times 10^{9}$$ Joules

D

$$6.4 \times 10^{10}$$ Joules