Two planets have the same average density but their radii are R1 and R2. If acceleration due to gravity on these planets be g1 and g2 respectively, then

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g1g2=R1R2

g1g2=R2R1

g1g2=R12R22

g1g2=R13R23

answer is A.

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Detailed Solution

g=43πρGR. If ρ= constant then g1g2=R1R2

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