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Could someone please help me with this problem?

## Homework Statement

A building is 40.0 m X 20.0 m X 11.0 m. The density of air is 1.20 kg/m^3. (A) What is the volume of the building in cubic feet? (B) What is the weight of air in the room in pounds?

## Homework Equations

Density=mass/volume

1kg is about 2lb

V=lhw

1m=3.281ft

## The Attempt at a Solution

a. (40.0 m)(20.0 m)=

800.00 m^2

3

(8.00 X 10^2 m^2)(11.0 m)=

8800m^3

8800m^3(3.281ft/m^3)=

28872.8=

28873 or 2.89 x 10^4 ft^3

b.

m=(1.20kg/m^3)(800m^3)

=960 kg

960kg(2lb/kg)=

1840 lb

Could someone please tell me if this is correct and if not show me where I made my mistake?

Thank you very much