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A uniform bar RS weighs 100 g and is 80 ...

A uniform bar RS weighs 100 g and is 80 cm long. From the end R, two masses 50 g and 100 g are hung from the bar at a distance of 10 cm and 60 cm respectively. If the bar is to remain horizontal when balanced on a knifeedge, its position is

A

42 cm from S

B

38 cm from R

C

38 cm form G

D

42 cm from R

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