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The percentage of uncertainty in measurement given as $55 \pm 2\;kg$ is approximately.

$(a)\;0.5 \%\\(b)\;1 \%\\(c)\;2 \%\\(d)\;4\% $
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Percentage of uncertainity $= \large\frac{2}{55} $$ \times 100$
$\qquad= 4\%$
Hence d is the correct answer.
answered Mar 18, 2014 by meena.p

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