The formula for the Volume(V) of the room is,
[tex]V=lwh[/tex]
Note:
[tex]1m=100cm[/tex]
Therefore,
[tex]\begin{gathered} 10m=10\times100=1000 \\ 12m=12\times100=1200 \\ 3.5m=3.5\times100=350 \end{gathered}[/tex]
Hence,
[tex]V=1000\times1200\times350=420000000cm^3[/tex]
Next:
[tex]V=10\times12\times3.5=420m^3[/tex]
Also:
[tex]1m=3.28ft[/tex]
Then
[tex]\begin{gathered} _10m=10\times3.28ft=32.8ft \\ 12m=12\times3.28ft=39.36ft\approx39.4ft \\ 3.5=3.5\times3.28ft=11.48ft\approx11.5ft \end{gathered}[/tex]
Therefore,
[tex]\begin{gathered} V=32.8\times39.36\times11.48=14820.77184\approx14820.8ft^3 \\ \end{gathered}[/tex]
Finally,
[tex]1m=1.09361yd[/tex]
Hence,
[tex]\begin{gathered} 10m=10\times1.09361=10.9361yd\approx10.9yd \\ 12m=12\times1.09361=13.12332yd\approx13.1yd \\ 3.5m=3.5\times1.09361=3.827635yd\approx3.8yd \end{gathered}[/tex]
Then,
[tex]V=10.9361\times3.827635\times13.12332=549.33428\approx549.3yd^3[/tex]