A car moves from Village **A** to Village **B** with a speed of **30 kmph**. After it reaches village **B**, it takes a **U**-turn and starts heading to village **A**. It travels half of its time with a speed of **25 kmph** and other half with a speed of **20 kmph**. Find the **average speed** of the car during the whole journey?

**Note:** Speed of car is uniform when it travels from village **A** to **B**, while when it is heading back to Village **A** from **B** its speed's are different i.e. **20 kmph** and **25 kmph**. You need to find average speed of car during the **whole journey**.

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