Question

Find the volume of iron required to make an open box whose external dimensions are 36cm*25cm*16.5cm the box being 1.5cm thick throughout. If 1cm of weight 8.5 grams. Find the weight of empty box in kilogram

Answer 1

External dimensions of the box =36x25x16.5cm
External volume of the box=
$14850 {cm}^{2}$

Thickness of the box =1.5cm
Internal dimensions =36-1.5cmx25-1.5cmx16.5-1.5cm
=34.5x 23.5x15
=2846.05cm^3
Volume of the box shell =