If a car travels a distance of 20 km in 2 h and another 10 km in 3 h, then the average speed of the car is ________.

Answer

To find the average speed of the car, we need to follow these steps:

### Step 1: Calculate the Total Distance
The car travels two distances:
- First distance = 20 km
- Second distance = 10 km

**Total Distance = First Distance + Second Distance**
\[ \text{Total Distance} = 20 \text{ km} + 10 \text{ km} = 30 \text{ km} \]

### Step 2: Calculate the Total Time
The car takes two times:
- Time for the first distance = 2 hours
- Time for the second distance = 3 hours

**Total Time = Time for First Distance + Time for Second Distance**
\[ \text{Total Time} = 2 \text{ hours} + 3 \text{ hours} = 5 \text{ hours} \]

### Step 3: Calculate the Average Speed
Average speed is calculated using the formula:
\[ \text{Average Speed} = \frac{\text{Total Distance}}{\text{Total Time}} \]
Substituting the values we calculated:
\[ \text{Average Speed} = \frac{30 \text{ km}}{5 \text{ hours}} = 6 \text{ km/h} \]

### Final Answer
The average speed of the car is **6 km/h**.

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