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- 0.2 g
- 0.4 g
- 2 g
- 4 g

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Mass of the planet, M=Vd=d×43πR3 where d is the density of the planet

⟹ g=43πdGR (for earth)

Given : d′=d and R′=0.2R

∴ g′=43πd′GR′=43πdG(0.2R)

⟹ g′=0.2g

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