Question

$90000\text{mg}=$ _____ $\text{kg}$.

• A. $0.9$
• B. $0.09$
• C. $9$
• D. $90$

Answer 1

The correct option is B $0.09$

$1\text{g}=1000\text{mg}$

$\Rightarrow 1\text{mg}=.001\text{g}$

$\Rightarrow 90000\text{mg}=.0001\times 90000=90\text{g}$

$1\text{kg}=1000\text{g}$

$\Rightarrow 1\text{g}=.001\text{kg}$

$\Rightarrow 90\text{g}=90\times .001=.09\text{kg}$

Option B is correct