Three equal cubes are placed adjacently in a row. The ratio of the total surface area of the resulting cuboid to that of the sum of the surface areas of three cubes, is (a) 7:9          (b)  49:81         (c)  9:7      (d)  27:23

Explanation

To solve the problem, we need to find the ratio of the total surface area of a cuboid formed by placing three equal cubes in a row to the sum of the surface areas of the three cubes. Let's break it down step by step.

### Step 1: Define the edge length of the cube
Let the edge length of each cube be \( A \).

### Step 2: Determine the dimensions of the cuboid
When three cubes are placed adjacently in a row, the dimensions of the resulting cuboid will be:
- Length \( L = 3A \) (since there are three cubes)
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