If there is an error of a% in measuring the edge of a cube, then percentage error in its surface is 2a% (b) `a/2%` (c) `3a %` (d) none of these

Explanation

To solve the problem of finding the percentage error in the surface area of a cube when there is an error of \( a\% \) in measuring the edge, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Problem**:
We know that the edge of the cube is measured with an error of \( a\% \). We need to find the percentage error in the surface area of the cube.

2. **Let the Edge Length be \( x \)**:
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