4. A closed box made of wood which is 3 cm thick.
Its external length, breadth and height are 56 cm,
39 cm and 30 cm, respectively. Find the capacity
of the box. Also, find the volume of wood used to
make the box.
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Step-by-step explanation:
internal
length=53cm
breadth=36cm
height=27cm
capacity of the box=volume of cuboid
=l×b×h
=53×36×27
=51516cm²
external
length=56
breadth=39
height=30
volume = lbh
= 65520cm²
volume of the wood=65520-51616
=14004cm²
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