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A planet has the mass 2 times10^12 kg & ...

A planet has the mass `2 times10^12` kg & a radius of 1000 km. rate of change of magnitude of acceleration due to gravity of this planet with distance from center of planet at a point 10000 km away from its center is
a) `1.33 times 10^-19` m /`s^2`
b) `2.67 times 10^-19` m /`s^2`
c) `1.33 times 10^-12` m /`s^2`
d) `4 times 10^-19` m /`s^2`

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