A metre stick is balanced on a knife edg...

A metre stick is balanced on a knife edge at its centre. When two coins, each of mass `5 g` are put one on of the other at the `12 cm` mark, the stick is found to balanced at `45 cm`. The mass of the metre stick is.

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A metre stick is balanced on a knife edge at its centre. When two coins, each of mass 5 g are put one on one of the other at the 12 cm mark, the stick is found to balanced at 45 cm . The mass of the metre stick is.

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