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A uniform disc of radius R is put over another uniform disc of radius 2R of same thickness and density. The peripheries of the two discs touch each other. The position of their centre of mass is

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By Expert Faculty of Sri Chaitanya
a
at R/3 from the centre of the bigger disc towards the centre of the smaller disc
b
at R/5 from the centre of the bigger disc towards the centre of the smaller disc
c
at 2R/5 from the centre of the bigger disc towards the centre of the smaller disc
d
none of the above

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detailed solution

Correct option is B

for uniform disc, distance from centre of bigger disc is


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