If the density of a block is $981 k g / m^{3}$ , it shall :

Sink in water

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Float in water

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Float completely out of water

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None of the above

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Solution

The correct option is B Float in water
A substance with a density greater than that of water will sink in water and a substance with a density less than that of water will float in water.
Density of water $= 1000 k g / m^{3}$
Here Density of substance/block $= 981 k g / m^{3}$
$1000 > 981$
Hence the block will float in water.
Therefore the correct option is (B).

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