Question

A box is made of wood with its external dimensions of 154 cm x 100 cm x 84 cm and thickness of 2 cm.

How much wood was used to make it?

Answer 1

Explanation:

volume of 154×100×84 box = 1,293,600 cm³

dimensions of airspace = (154-4) by (100-4) by (84-4) = 150 by 96 by 80

volume of airspace = 150×96×80 = 1,152,000 cm³

volume of wood used = 1,293,600 - 1,152,000 = 141,600 cm³