Convert 30 cm² in m²

We know that,

$1 \mathrm{cm} =\frac{ 1}{100 }\mathrm{m}$

$30 {\mathrm{cm}}^2=30\times \frac{ 1}{100 }\mathrm{m} \times \frac{ 1}{100 }\mathrm{m}$

$=\frac{ 30}{10000 } {\mathrm{m}}^2$

$=0.003 {\mathrm{m}}^2$

Therefore, 30 cm² $=0.003 {\mathrm{m}}^2$.