Question

solve this 8th ques.

Answer 1

Hi friend✋✋✋✋
--------------
Your answer
------------------

External dimensions of a box = (90 cm × 72 cm × 60 cm )

Thickness of the wood = 3 cm

Now,
---------

Internal dimensions : -

Length = [ 90 - (2 × 3)] cm = 84 cm

Breadth = [72 - (2 × 3)] cm = 66 cm

As it is not mentioned that the box is open or closed, we assume it as a closed box.

So, Height = [60 - (2 × 3)] cm = 54 cm

Then,
-----------

Volume of wood used = External volume - Internal volume

= [ (90 × 72 × 60) - (84 × 66 × 54)] cm³

= [ 38880 - 299376] cm³

= 89424 cm³

Weight of 1 cm³ of wood = 1.20 grams

Weight of the wooden box = (89424 × 1.20) grams = 107308.8 grams = 10.7 kg

HOPE IT HELPS