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Two planets of radii in the ratio 2 : 3 are made from the material of density in the ratio 3 : 2. Then the ratio of acceleration due to gravity g1 /g2 at the surface of the two planets will be

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a

1

b

2.25

c

4/9

d

0.12

answer is A.

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Detailed Solution

g1g2=ρ1ρ2×R1R2=32×23=1

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