Question
A lidless metal box has external dimensions 25cm×20cm×12cm. If the thickness is uniformly 1 cm, find the volume of metal used in the box.
Answers
Damon
outside volume= 25 * 20 * 13 (with lid one cm thick)
inside volume = 24 * 19 * 12
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subtract those then
subtract lid 1 * 25 * 20
inside volume = 24 * 19 * 12
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subtract those then
subtract lid 1 * 25 * 20