A box with lid is made of 2cm thick wood. Its external length, breadth and height are 25cm, 18cm and 15cm respectively. How much cubic cm of a liquid can be placed in it? Also, find the volume of the wood used in it.

Explanation

To solve the problem step by step, we will calculate the internal dimensions of the box first, then find the volume of liquid it can hold, and finally calculate the volume of the wood used.

### Step 1: Calculate Internal Dimensions of the Box
The external dimensions of the box are given as:
- External Length (L) = 25 cm
- External Breadth (B) = 18 cm
- External Height (H) = 15 cm

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