Question

The length of a wire is $2.17cm$ and radius is $0.46cm$. The number of significant digits in the value of volume of wire is ___.

Answer 1

Answer: 2

The volume of wire
$=\pi r^{2}l=3.14\times (0.46{)}^2\times 2.17c{m}^3$
$=1.4418c{m}^3=1.4c{m}^3$
Thus, number of significant digits in $1.4c{m}^3$ is $2$ .