Masses, m¹ and m² at the 20-cm and 65-cm marks respectively of a uniform metre rule freely suspended at its centre of gravity. If the metre rule balances horizontally, determine the ratio m²: m¹

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A. 2 : 1
B. 3 : 3
C. 2 : 3
D. 1 : 2

Correct Answer: Option D

D. 1 : 2

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