Question

External dimensions of a wooden cuboid are 30 cm × 25 cm × 20 cm. if the thickness of the wood is 2 cm all around, solve to find the volume of the wood contained in the cuboid formed.

Answer 1

external volume= 30*25*20 = 15000cm cube
internal dimensions= (30-4)cm*(25-4)cm*(20-4)cm
= 26cm*21cm*16cm
internal volume = 26cm*21cm*16cm
= 8736 cm cube
volume of wood = external volume - internal volume= (15000-8735)cm cube
=6265cm cube.

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Answer 2

Answer: 6264 cubic cm

Step-by-step explanation:

External length of the cuboid = 30 cm

External breadth of the cuboid = 25 cm

External height of the cuboid = 20 cm

Therefore, External volume of the cuboid = (30 × 25 × 20) cm³

                                                      = 15000 cm³

Internal dimensions of the cube= 30-4, 25-4 and 20-4

Therefore, Internal volume of the cuboid = (26 × 21 × 16) cm³

                                                      = 8736 cm³

Therefore, Volume of wood = External Volume - Internal Volume

= 15000 cm³ - 8736 cm³

= 6264 cm³