A body covers half the distance with a speeed of 20 `m//s` and the other half with a sopeed of 30 `m//s`. What is the average speed of the whole journey ?

Explanation

To find the average speed of the body over the entire journey, we can follow these steps:

### Step 1: Define the total distance
Let's denote the total distance of the journey as \( D \). Since the body covers half the distance at one speed and the other half at another speed, we can say:
- Distance for the first half = \( \frac{D}{2} \)
- Distance for the second half = \( \frac{D}{2} \)

### Step 2: Calculate the time taken for each half
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