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Home  >>  JEEMAIN and AIPMT  >>  Physics  >>  Class11  >>  Units and Measurement
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What is the total length of a line where different segments measure $8.26\;cm,2.3\;cm,2.89\;cm$ and $7.762\;cm?$

$\begin{array}{1 1}(A)\;21.2\;cm \\(B)\;2.3 \;cm \\(C)\;0.98 \;cm \\(D)\;2.5\;cm \end{array} $

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Since significant place is the tenth place, rounding off the individual value to nearest hundredth (one place more) we have 8.26+2.3+2.89+7.76 = 21.21 cm.
Hence A is the correct answer.
answered Jul 11, 2014 by meena.p
edited Jul 11, 2014 by balaji.thirumalai

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