Question

A box without a lid is made of wood which is 3cm thick. It's external dimensions are 86cm × 60cm × 45cm .
find
1) the capacity of the box in cubic centimeters
2) the volume of wood used in making the box , and
3) The weight of the empty box, if 1cm cube of wood weighs 0.8 grams​

Answer 1

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A box with a lid is made of wood which is 3 cm thick. Its external length, breadth and height are 56 cm,39 cm and 30 cm respectively. Find the capacity of the box. Also, find the volume of wood used to make the box.

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Solution

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For external box,

L=56 CM

B=39 CM

H=30 CM

VOLUME =L×B×H=56×39×30=65520 CM³

For internal ,

L=56−6=50 cm

B=39−6=33 cm

H=30−6=24 cm

VOLUME =L×B×H=50×33×24=39600 CM³

WOOD USED =65520−39600=25920 CM³