Question

find the volume of metal required to make a box of thickness 1cm with external measurements 12cm 7cm 10cm

Answer 1

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

External dimensions of a metal box : -

Length = 12 cm

Breadth = 7 cm

Height = 10 cm

Thickness = 1 cm

Internal dimensions of the box : -

Length = [12 - (2 × 1)] cm = 10 cm

Breadth = [7 - (2 × 1)] cm = 5 cm

As it is not mentioned, we are taking the box as a closed box.

Height = [10 - (2 × 1)] cm = 8 cm

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

Volume of the metal = External volume - Internal volume

= [(12 × 7 × 10) - ( 10 × 5 × 8)] cm³

= [840 - 400] cm³

= 440 cm³

HOPE IT HELPS