Answer: First option is correct.
Explanation:
Since we have given that
Length of bedroom = 20 ft
Width of bedroom = 10 ft
Height of bedroom = 10 ft
We need to find the volume of bedroom.
As we know the formula for "Volume of cuboid":
So, Volume of bedroom would be
![20* 10* 10\\\\=2* 10* 10* 10\\\\=2* 10^3\ ft^3](https://img.qammunity.org/2020/formulas/mathematics/high-school/2f0ei7x9y1uqy0jq60qsicn7a8o369a736.png)
Hence, First option is correct.