What is the change in energy required to move a satellite from an orbit of radius $2R$ to an orbit of radius $3R$? ($R$ = radius of the Earth)

  • A
    $\frac{GMm}{12R^2}$
  • B
    $\frac{GMm}{3R^2}$
  • C
    $\frac{GMm}{8R}$
  • D
    $\frac{GMm}{6R}$

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