A carpenter constructed a closed wooden box with internal measurements 1.5 metres long ,0.8 metres wide and 0.4 metres high . The wood used in constructing the box was 1.0cm thick and has a density of 0.6g/cm3.

Question

[1]: volume in cm3 of wood used in consting the box.
2:mass of the box in kilo grams correct to 1dp

Answer 1

draw a sketch.
top and bottome volume, each: (1.52 long )(.82 wide)*.01
front and back: (.82)(.4) (.01)each
ends, each; .4*.8*.01)

Answer 2

1: outer volume minus inner volume
... in cm ... (152 * 82 * 42) - (150 * 80 * 40)

2: wood volume multiplied by density

Answer 3

I think we start by the area of the box