Question

the outer dimension of a closed wooden box are 10 cm by 8 cm by 7 cm thickness of the wood is 1 cm find the cost of wood required to make box if 1 cm cube of wood cost rupees 2.00

Answer 1

Solution :

Let Outer dimensions of a closed

box :

Length (L) = 10cm,

Breadth (B) = 8cm

Height(H) = 7cm

Thickness of the box (W) = 1cm

Inner dimensions of the box:

length (l) = L - 2W

= 10 - 2× 1 = 8cm

Breadth (b) = B - 2W

= 8 - 2 = 6 x

Height (h) = H - 2W

= 7 - 2 = 5cm

Now ,

Required wood to make the box

( V ) = LBH - lbh

= 10×8×7 - 8×6×5

= 560 - 240

= 320 cm³

It is given that ,

Cost of 1 cm³ wood = Rs 2

Cost of making the box = 320 × 2

= Rs 640



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