A box with lid is made of 2 cm thick wood. Its external length, breadth, and height are 25 cm, 18 cm, and 15 cm, respectively. Find the length, breadth, and height of the inner part of the box?

To find the dimensions of the inner part of the box, we need to subtract the thickness of the lid and the walls from the external dimensions.

Length:

Inner length = External length - 2 * (2 cm thickness of wood)

25 cm - 2 * 2 cm = 23 cm

Breadth:

Inner breadth = External breadth - 2 * (2 cm thickness of wood)

18 cm - 2 * 2 cm = 14 cm

Height:

Inner height = External height - 2 * (2 cm thickness of wood)

15 cm - 2 * 2 cm = 11 cm

So, the dimensions of the inner part of the box are:

Length: 23 cm

Breadth: 14 cm

Height: 11 cm