Question

the outer dimensions of a closed wooden box are 10cm 8cm and 7cm. thickness of the wood is 1cm. find the total cost of wood required to make the box if 1cm of wood costs Rs 2.00

Answer 1

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Answer 2

AnswEr:

$\underline\mathcal\pink{Dimensions:-}$

• Length = 10 cm
• Breadth = 8 cm
• Height = 7 cm

__________________________

$\therefore$ External Volume of the box = (10 × 8 × 7) cm³ = 560 cm³.

• Thickness of wood = 1 cm

$\therefore$ Internal length = 10 - 2 = 8 cm

Internal Breadth = 8 - 2 = 6 cm

Internal height = 7 - 2 = 5 cm

$\therefore$ $\sf{Internal\:Volume=}$ ( 8 × 6 × 5 ) cm³ = 240 cm³

____________

Volume of the wood = External volume - Internal volume.

= ( 560 - 240 ) cm³

= 320 cm³

_____________

Hence, total cost of the wood required to make box

= Rs ( 320 × 2 )

= Rs 640