A wooden box is 140cm long,100cm wide and 80cm high.If the wood thickness is 5cm on all sides of the box,what was the volume of wood used to make the box?Give your answer in cubic meters.
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external dimension of a cuboid is 140 cm into 100 cm into 80 CM
since the thickness of a cuboid is 5 centimetre on all sides
so , then internal dimension of a cuboid will be 130 cm 90 cm 70 cm
volume of wood required to make wooden box = external vol - internal volume of the cuboid
= (140 cm * 100 cm * 80 cm ) -( 130 cm *70 cm * 90 cm )
=1120000cm^3 - 897000cm^3
=223000cm^3
vol. in m^3 = 223000/1000000
= 0.223m^3
since the thickness of a cuboid is 5 centimetre on all sides
so , then internal dimension of a cuboid will be 130 cm 90 cm 70 cm
volume of wood required to make wooden box = external vol - internal volume of the cuboid
= (140 cm * 100 cm * 80 cm ) -( 130 cm *70 cm * 90 cm )
=1120000cm^3 - 897000cm^3
=223000cm^3
vol. in m^3 = 223000/1000000
= 0.223m^3
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