The length of a cold storage is double its breadth. Its height is `3\ m e t r e sdot` The area of its four walls (including doors) is `108\ m^2dot` Find its volume.

Explanation

To solve the problem step by step, we will follow these instructions:

### Step 1: Define the variables
Let the breadth of the cold storage be \( B \) meters. According to the problem, the length \( L \) is double the breadth, so:
\[ L = 2B \]
The height \( H \) is given as:
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