Ishita noted down the following observations .

1. weight of stone in air =280 gwt
​​2. weight of stone in salty water = 190 gwt
3. weight of stone in water = 240 gwt
find the relative density of salty water.

Relative density = weight in mediumloss in weight= weight in slaty waterweight in air - weight in salty water= 190280-190= 2.1

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