Question

the outer dimensions of a closed wooden box are 16cm by 12 cm by 8cm.thickness of the wood is 1cm. find the total costof the wood required to make box, if one cm cube of wood costs rs 2.50

Answer 1

$\Longrightarrow{\boxed{\bold{Answer: Rs\:1735 }}}$

$\textbf{\underline{Step-by-step explanation :- }}$

Outer dimension of box = 16 cm × 12 cm × 8 cm

= 1536 cm³

Now think of a cardboard thick 1 cm. There are two length, two breadth and two height in box. There fore total length of thickness is 2 × 1 is 2 cm.

Inner dimensions = ( 16 - 2 ) × ( 12 - 2 ) × ( 8 - 2 ) cm³

= 14 × 10 × 6 cm³

= 840 cm³

Now, remaining volume = 1536 - 840 cm³

= 694 cm³

Now, 1 cm³ costs = Rs 2.5

694 cm³ will cost = 694 × Rs 2.5

$\textbf{\huge{=\underline{Rs 1735}}}$