the outer dimensions of a closed box are 72 cm,48cm and 36 cm if it it is made of wood of 1.5 cm thick,find the volume of air inside it.
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Given, outer length =72 cm
Outer breadth =48 cm
Outer height =35 cm
Thickness of wooden , w=1.5 cm
Inner length =l–2w=72–3=69 cm
Inner breadth =b–2w=48–3=45 cm
Inner height =h–2w=36–3=33 cm
Inner volume =69×45×33=102465cm^3
The volume of air inside it=102465 cm^3
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