In the above example, how is the speed of the image affected if the motor bike comes closer to the car at (a) 30 m from the car (b) 20 m from the car?

Explanation

To solve the problem of how the speed of the image is affected when the motorbike comes closer to the car at different distances (30 m and 20 m), we will use the mirror formula and differentiate it to find the rate of change of the image speed.

### Step-by-Step Solution:

1. **Understanding the Mirror Formula**:
The mirror formula is given by:
\[
\frac{1}{v} + \frac{1}{u} = \frac{1}{f}
...