Question

The area of a sheet of length $10.2cm$ and width $6.8cm$ addressed upto proper number of significant figures is

• A. $69.36c{m}^2$
• B. $69.4c{m}^2$
• C. $69c{m}^2$
• D. $70c{m}^2$

Answer 1

Answer: (C)

$I=10.2cm$
$w=6.8cm$
Area $=Iw=10.2\times 6.8=69.36$
$\Rightarrow$ Area $=69c{m}^2$