If the radius of a sphere is measured as 9 m with an error of 0.03 m, then find the approximate error in calculating its surface area.

Explanation

To find the approximate error in calculating the surface area of a sphere when the radius is measured with an error, we can follow these steps:

### Step 1: Understand the given information
- The radius of the sphere \( r = 9 \) m.
- The error in the radius \( \Delta r = 0.03 \) m.

### Step 2: Write the formula for the surface area of a sphere
The surface area \( A \) of a sphere is given by the formula:
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