Answers

2014-07-24T21:43:07+05:30

This Is a Certified Answer

×
Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
External dimensions are : A = 18cm, B = 10 cm,  C = 6cm
thickness: T = 5mm = 0.5 cm
Each side of the box it is 0.5 cm thick. The hollow portion inside has a length       A'" = A - 2 * thickness , as along a dimension of a box we have two surfaces having thickness 0.5 cm.
The hollow box (empty space inside box) has size : A" = 18 - 2 * 0.5cm = 17cm
  B" = 10 - 2 * 0.5 = 9cm  and C" = 5cm
External volume of box = V = A B C = 1080 cm³
Internal hollow part of box = W = A" B" C" = 17*9*5 cm³
Actual volume of wood in box = V - W = 315 cm³
Weight per 1 cubic cm of wood = 3.15 / 315 = 0.01 kg/cm³
0