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Q.

A body just floats in sea water but sinks in river water because:

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a

Sea water has lesser density than river water.

b

Sea water has greater density than river water.

c

Sea water exerts less upthrust on the body than river water. 

d

 River water is more contaminated than sea water

answer is B.

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Detailed Solution

Seawater is denser than river water due to the addition of salt hence, seawater is more dense than river water, a body simply floats in the latter while sinking in the former.

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