A car covers 100 km in first 2 hours , 64 km in the next 1 hour and 72 km in the next 2 hours . Find the average speed of the car during the whole journey .

Answer

To find the average speed of the car during the whole journey, we will follow these steps:

### Step 1: Calculate the total distance covered
The car covers three different distances:
- First segment: 100 km
- Second segment: 64 km
- Third segment: 72 km

**Total Distance = 100 km + 64 km + 72 km**

**Total Distance = 236 km**

### Step 2: Calculate the total time taken
The time taken for each segment is:
- First segment: 2 hours
- Second segment: 1 hour
- Third segment: 2 hours

**Total Time = 2 hours + 1 hour + 2 hours**

**Total Time = 5 hours**

### Step 3: Use the formula for average speed
The formula for average speed is:

**Average Speed = Total Distance / Total Time**

Substituting the values we calculated:

**Average Speed = 236 km / 5 hours**

**Average Speed = 47.2 km/h**

### Final Answer
The average speed of the car during the whole journey is **47.2 km/h**.

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