Make your own hydrometer with a cylinder shape bottle and potting some weight inside.
Paste a graph paper scale on the outer surface to measure the immersed depth. Adjust almost 1/3rd part submerged in water)
Use the hydrometer to find the relative density of salt solution, sugar solution, milk or oil (Any three) taking the density of water as 1.
Use formula
RD = Height inside water / Height inside liquid
(Take cold water of temperature around 40C roughly)
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40C answer galat hoga to maf karana
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