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Round off to three significant figures (i) 9.745 g (ii) 9.835 cm (iii) 28457 m.

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The correct Answer is:
(i) 9.74 (ii) 9.84 cm (iii) `2.85xx10^(4)m`
a. Total mass `=2.3+0.02015+0.02017=2.34032=2.3kg` ( `:.` mass in the box has only two significant figures ) b. Difference `=20.17-20.15=0.02g=0.020g`
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