How many cubic centimetres of iron are there in an open box whose external dimensions are 36cm, 25cm and 16.5cm, the iron being 1.5cm thick throughout? If 1 cubic cm of iron weighs 15g, find the weight of the empty box in kg.

Explanation

To solve the problem step by step, we will calculate the volume of iron in the open box and then find the weight of the empty box.

### Step 1: Identify External Dimensions
The external dimensions of the open box are given as:
- Length (L) = 36 cm
- Breadth (B) = 25 cm
- Height (H) = 16.5 cm

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