The external dimensions of an open iron box are 20cm,15cm and 12cm.if the thickness of iron is 1cm.find the volume of the iron.
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Step-by-step explanation:
external volume =l×b×h
=(20×15×12)cubic centi meter
=3600 cubic centimeter
internal length =20-(1+1)cubic centimeter
=18cubic centimeter
internal breadth=15-(1+1)cubic centimeter
=13 cubic centimeter
internal height=12-1 cubic centimeter
internal volume =l×b×h
=18×13×13 cubic centimeter
=3042 cubic centimeter
volume of iron
= external volume -internal volume
=(3600-3042) cubic centimeter
=558 cubic centimeter
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