Three cubes whose edges measure 3cm, 4cm and 5cm respectively to form a single cube. Find its edge. Also, find the surface area of the new cube.

Explanation

To solve the problem step by step, we will first find the volume of the three smaller cubes, then use that to find the edge of the new larger cube, and finally calculate the surface area of that larger cube.

### Step 1: Calculate the volume of each smaller cube
The formula for the volume of a cube is given by:
\[ \text{Volume} = \text{edge}^3 \]

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