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Q.

Particles of masses 1gm, 2gm, 3gm and 4 gm are placed at x=1cm, x=2cm, x=3cm, x=4cm  respectively. Then Xcm=

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a

2cm

b

4cm

c

3cm

d

1cm

answer is C.

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Detailed Solution

XCM=m1x1+m2x2+m3x3+m4x4m1+m2+m3+m4=3cm

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