The length and breadth of a rectang...
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The length and breadth of a rectangular sheet are ( 16.2 mathrm{cm} ) and ( 10.1 mathrm{cm} ) respectively. The area of the sheet in appropriate significant figures and error is
(a) ( 164 pm 3 mathrm{cm}^{2} )
(b) ( 163.62 pm 2.6 mathrm{cm}^{2} )
(c) ( 163.6 pm 2.6 mathrm{cm}^{2} )
(d) ( 163.62 pm 3 mathrm{cm}^{2} )

JEE/Engineering Exams
Physics
Solution
250
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length: ( 16.2 mathrm{cm} )
Breadsh ( =10 cdot 10 mathrm{m} )

3 signitioni 
3 significand
So, Area will have 3 significant
[
begin{array}{l}
=16.2 times 10^{-1}
=163.62 Rightarrow 5 text { sugnifican }
end{array}
]
( =164 ) (round of to 3 significant
Ans (a) only
(a) has ( 164 pm ) error

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