Keeping the significant figures in view, the sum of the physical quantities $52.01 \ m$, $153.2 \ m$, and $0.123 \ m$ is: (in $m$)

The mass and volume of a body are $4.237 \ g$ and $2.5 \ cm^3$,respectively. The density of the material of the body in correct significant figures is $:-$ (in $g \ cm^{-3}$)

The resistance is $10.845 \ \Omega$ and the current is $3.23 \ A$. The voltage is $35.02935 \ V$. Express the result in appropriate significant figures. (in $V$)

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.

What is the number of significant figures in the result of $(3.20 + 4.80) \times 10^5$?

The decimal equivalent of $\frac{1}{20}$ up to three significant figures is