Question

a box with a lid is made of 2 cm thick wood. Its external dimensions are 25 cm x 18 cm x 15 cm. How many cubic cm of rice can be placed in it? Also, find the volume of wood used in the

Answer 1

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Answer 2

External volume of box = 25* 18 * 15 = 6, 750 cm³

Along each dimension of the box, there will be two thicknesses of wood.

So internal dimensions of the box are (25-2*2cm) X (18-2*2cm) X (15-2*2cm)
So internal volume = 21 * 14 * 11 = 3, 234 cm³
   (this is the capacity of the box, or amount of rice that can be stored)

So volume of wood used in the box = 6,750 - 3,234 = 3,516 cm³