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

A metre scale is balanced on a knife edge at its centre. When two coins, each of mass 10 g are put one on the top of the other at the 10.0 cm mark the scale is found to be balanced at 40.0 cm mark. The mass of the metre scale is found to be x `xx 10^(-2)` kg. The value of x is _______

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JEE MAINS PREVIOUS YEAR-JEE MAINS 2022-Physics - Section B
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