Why does relative density have no unit?

A. क्योंकि यह दो densities का ratio है / Because it is 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 often unitless.

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