Question

- A closed box is made of wood which is 2 cm thick. If the external dimensions of the box
are 25 cm, 18 cm and 15 cm, find the following.
i.Capacity of the box ii. Volume of wood in it
iii.Mass of the box if 1 cm of wood has a mass of 10 g​

Answer 1

Given, thickness of wood = 2 cm

external dimensions = 25 cm ×18 cm × 15 cm

Therefore, internal dimensions

= 25-2 cm × 18-2 cm × 15-2 cm

= 23 cm × 16cm × 13cm

So, cubic cm of rice can be placed in it

= internal volume of the box

= 23×16×13 = 231,613 cm³

Hence, volume of wood used in the box = (25×18×15) - (23×16×13) = 231613 cm³