Why does relative density have no unit?

A. यह दो densities का ratio है / It is a ratio of two densities

Step 1: Identify the concept: this is density ratio. Step 2: Relative density is ratio of density of substance to density of water so units cancel out. Step 3: Remember ratio quantities are generally unitless.

Step 1: concept पहचानें: यह density ratio है। Step 2: Relative density substance density और water density का ratio है इसलिए units cancel हो जाती हैं। Step 3: Ratio quantities generally unitless होती हैं याद रखें।