Question

The length of a side of a square is $10cm$. What is its area in square meter?

• A. $1m^2$
• B. $0.01m^2$
• C. $0.1m^2$
• D. $0.001m^2$

Answer 1

The correct option is B

$0.01m^2$

Given,

Length of the side $\left(a\right)$ = $10cm$

Area of square = $a^2$ = $(10cm{)}^2$

We know $1m=100cm$ or $1cm={10}^{-2}m$

Area of square = $(10cm{)}^2$

= $100c{m}^2$ = $100({10}^{-2}m{)}^2$ = $0.01m^2$