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The radii of two planets are respectively R1 and R2 and their densities are respectively p1 and p2 . The ratio of the accelerations due to gravity at their surfaces is

(a) g₁:g₂ = p₁/R₁²: p²/R₂² (b) g₁:g₂= R₁R₂: p₁p₂

(c) g₁:g_{2 =} R1 p2 : R₂p₁ (d) g₁:g_{2 =} R₁p₁ : R₂p2

Answer: d

(10)

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