Question

Density is the ratio of ____ per unit volume

• A. length
• B. mass
• C. area
• D. volume

Answer 1

The correct option is B

mass

Explanations for correct option:(b)

1. Density is defined as the amount of mass present per unit volume of an object.
2. It is also tells how close matter is packed in an object.
3. Formula $\mathrm{Density}=\frac{\mathrm{Mass}}{\mathrm{volume}}$

Explanations for Incorrect options:(a),(c),(d)
Length is a fundamental quantity whereas area and volume is calculated from quantities of length, breadth and height of an object.

Hence, the correct option is (B).