MHT CET Physics question

PhysicsOscillationsMHT CET

The length of second pendulum is 1 m on the earth. If the mass and diameter of the planet is double than that of the earth, then the length of the seconds pendulum on the planet will be [MHT-CET 2023]

Answer: (C)

Solution

and for a seconds pendulum , so

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Question ID VK-068413