Q.

A wooden cube just floats inside water with a 200 gm mass placed on it. When the mass is removed, the cube floats with its top surface 2 cm above the water level. What is the side of  the cube in cm?
 

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a

8

b

12

c

10

d

6

answer is C.

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Detailed Solution

m= hL2 ρ 200 = 2 L21 L2=100 L=10 cm

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