Q.

A cube of wood supporting a 200 gm mass just floats in water. When the mass is removed, the cube rises by 2 cm ,then length of side of the cube is

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a

8 cm

b

12 cm

c

6 cm

d

10 cm

answer is D.

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Detailed Solution

A side of cube   mg=Vdwg ⇒200g=2a2×1×g   a=10 cm
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