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MHT CET Physics question

PhysicsGravitationMHT CET

Two spherical planets and have the same uniform density , masses and and surface areas and , respectively. A spherical planet also has uniform density and its mass is . The escape velocities from the planets , and are , and , respectively. Then,

Answer: (B),(D)

Solution

Areas give radii and masses ; with equal density , and planet R has mass so its radius is , giving

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Question ID VK-060211