If the length of a rod is measured as $830600 \ mm$, then the number of significant figures in the measurement is

The length,breadth,and thickness of a rectangular sheet of metal are $4.234 \; m$,$1.005 \; m$,and $2.01 \; cm$ respectively. Give the area and volume of the sheet to correct significant figures.

$A$ person measures the mass of $3$ different particles as $435.42 \ g$,$226.3 \ g$,and $0.125 \ g$. According to the rules for arithmetic operations with significant figures,the sum of the masses of the $3$ particles will be: (in $g$)

$A$ substance of mass $49.53 \ g$ occupies $1.5 \ cm^3$ of volume. The density of the substance (in $g \ cm^{-3}$) with the correct number of significant figures is:

If the side length of a cube is $7.203 \ m$,then its volume is ............ $m^3$.

If the length of a rectangular plate is $1.5\, cm$ and the width is $1.203\, cm$, then its area is ............ $cm^2$.