Question

Calculate area enclosed by a circle of diameter $1.06m$ to correct number of significant figures.

• A. $0.883m^2$
• B. $0.0883m^2$
• C. $0.88333m^2$
• D. $0.8830m^2$

Answer 1

The correct option is A $0.883m^2$

Area = $\pi (\frac{d}{2}{)}^2$

$\Rightarrow Area=\frac{22}{7}\times {0.53}^2=0.882828$

But, no of significant in diameter should be equal to the no. of significant in Area, so Ans is $0.883m^2$