Q.

The reading of a spring balance when a block is suspended from it in air is 60N. This reading is changed to 40 N when the block is immersed in water. The specific gravity of the block  is ____

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answer is 3.

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Detailed Solution

Specific gravity (or) relative density 
=    weight  of   block  in  airchange  in  weight  in  water=6020=3 
 

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