Question

Which of the following length measured is most accurate and why?
(a) $500.0cm$
(b) $0.0005cm$
(c) $6.00cm$

Answer 1

Error in $\left(i\right)$ is $0.1cm=\frac{1}{10}cm$

Error in$\left(ii\right)$ is $0.0001=\frac{1}{1000}cm$

Error in $\left(iii\right)$ is $0.01cm=\frac{1}{100}cm$

$\therefore$` Measurement $\left(ii\right)$ is most accurate, upto fourth

place of decimal.