find the volume of wood used to make a closed box of outer dimensions 60 cm*45 cm*32cm,the thickness of wood is 2.5 cm.
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Volume of outer box = l×b×h
=60×45×32
=86400cm3
Volume of inner box=l×b×h
= 60×45×30
= 81000cm3
86400-81000
Volume=54000cm3
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