The length and breadth of a metal sheet are $3.124\,m$ and $3.002\,m$. The area of the sheet is: (in $,m^2$)

Match List-$I$ with List-$II$.

List-$I$ (Number)	List-$II$ (Significant figures)
$A. 1001$	$I. 3$
$B. 010.1$	$II. 4$
$C. 100.100$	$III. 5$
$D. 0.0010010$	$IV. 6$

Choose the correct answer from the options given below:

The mass of a box measured by a grocer's balance is $2.30 \ kg$. Two gold pieces of masses $20.15 \ g$ and $20.17 \ g$ are added to the box. What is
$(a)$ the total mass of the box,
$(b)$ the difference in the masses of the pieces to correct significant figures?

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

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

Find the value of $\frac{1.53 \times 0.9995}{1.592}$ with due regard for significant figures.