The side of a cube is measured by vernier callipers (`10` divisions of a vernier scale coincide with `9` divisions of main scale, where `1` division of main scale is `1mm`). The main scale reads `10mm` and first division of vernier scale coincides with the main scale. Mass of the cube is `2.736 g`. find the density of the cube in appropriate significant figures.

Options

A. `2.65 g"/"cm^3`
B. `2.66 g"/"cm^3`
C. `2.656 g"/"cm^3`
D. `2.650 g"/"cm^3`

Answer

B

Explanation

Density of material `=(m)/(v)=(2.736)/(1.03)=2.65631g"/"cm^(3)`
Number of significant digits in this value should be 3, hence we can round it off accordingly.
Thus density of material `=2.66g"/"cm^(3)`.