the outer dimension of a closed box are 42 CM 30cm and 20 CM if the box is made of wood of thickness 1 cm determine the volume of wood used
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consider one face of the rectangular box. so from outer dimension thickness will be subtracted twice to find the inner dimensions
the outer dimensions of the closed box are 42cm , 30 cm and 20 cm.
the thickness of the wood = 1 cm.
to find the inner dimension we will subtract twice the thickness from the outer dimensions.
the inner dimensions of the closed box are 42-2*1=40 cm and 30-2*1 = 28 cm and 20-2*1 = 18 cm
therefore the volume of the wood used
= volume of the external box - volume of the internal box
= 42*30*20 - 40*28*18
=25200-20160
=5040 cubic cm
hope this helps you.
the outer dimensions of the closed box are 42cm , 30 cm and 20 cm.
the thickness of the wood = 1 cm.
to find the inner dimension we will subtract twice the thickness from the outer dimensions.
the inner dimensions of the closed box are 42-2*1=40 cm and 30-2*1 = 28 cm and 20-2*1 = 18 cm
therefore the volume of the wood used
= volume of the external box - volume of the internal box
= 42*30*20 - 40*28*18
=25200-20160
=5040 cubic cm
hope this helps you.
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