The number of significant figures in $4.870 \ m$ is

What is a significant number? What is a significant digit?

What is the number of significant digits for a number that does not represent a measurement?

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

The length,breadth,and thickness of a block are given by $l = 12 \, cm$,$b = 6 \, cm$,and $t = 2.45 \, cm$. The volume of the block according to the rules of significant figures should be:

The number of significant figures in the measured value $4.700 \,m$ is the same as that in the value ....... $m$