find the volume of wood required for making a closed box with internal dimensions 20cm by 12.5 cm by 9.5 cm, wood 1.25 cm thick
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Answer:
1675cm3
Step-by-step explanation:
external dimensions:
= (20+2.5) × (12.5+2.5) × (9.5+2.5)
= 22.5×15×12
volume = 22.5×15×12
=4050cm3
volume of internal dimensions;
= 20×12.5×9.5
=2375cm3
volume of wood= 4050-2375
=1675cm3
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