If each edge of a cube is increased by 50%, the percentage increase in its surface area is 50%           (b)  75%        (c)  100%         (d)  125%

Explanation

To solve the problem of finding the percentage increase in the surface area of a cube when each edge is increased by 50%, we can follow these steps:

### Step-by-Step Solution

1. **Define the Initial Edge Length**:
Let the initial edge length of the cube be \( A \).

**Hint**: Start by defining the variable that represents the edge length of the cube.
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