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

at 2R/5 from the centre of the larger disc

at 5R/3 from the centre of the larger disc

at 2R/3 from the centre of the larger disc

at 3R/5 from the centre of the larger disc

at 2R/5 from the centre of the larger disc

A uniform disc of radius R is put over another uniform disc of radius

1.	A uniform disc of radius R is put over another uniform disc of radius 2R of same thickness and density. The edges of the two discs touch each other. What is the position of their centre of mass?
A.	at 5R/3 from the centre of the larger disc
B.	at 2R/3 from the centre of the larger disc
C.	at 3R/5 from the centre of the larger disc
D.	at 2R/5 from the centre of the larger disc
Answer» D. at 2R/5 from the centre of the larger disc

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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 edges of the two discs touch each other. What is the position of their centre of mass?

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