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A cube of wood supporting a 400 g just floats in water. When the mass is removed, the cube rises by 2 cm. What is the side of the cube nearly ?

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24.24 cm

1.414 cm

14.14 cm

28.28 cm

answer is B.

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Detailed Solution

so the weight of water displaced is 400g.

$ρ (A \times 2) = 0.4 \times 10$

So, area of cube is 200cm².

length of each side= 14.14cm

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