To cover a distance of 225km in 2.5 hours what should be the average speed of the car in metre/second?

Options

A. 90 metre/second
B. 45 metre/second
C. 50 metre/second
D. 25 metre/second

Answer

To find the average speed of the car in meters per second, we can follow these steps:

### Step 1: Identify the given values
- Distance (D) = 225 km
- Time (T) = 2.5 hours

### Step 2: Convert the distance from kilometers to meters
1 kilometer = 1000 meters, so:
\[ 225 \text{ km} = 225 \times 1000 \text{ m} = 225000 \text{ m} \]

### Step 3: Convert the time from hours to seconds
1 hour = 3600 seconds, so:
\[ 2.5 \text{ hours} = 2.5 \times 3600 \text{ seconds} = 9000 \text{ seconds} \]

### Step 4: Calculate the average speed in meters per second
The formula for average speed is:
\[ \text{Average Speed} = \frac{\text{Total Distance}}{\text{Total Time}} \]
Substituting the values we have:
\[ \text{Average Speed} = \frac{225000 \text{ m}}{9000 \text{ s}} \]
Calculating this gives:
\[ \text{Average Speed} = 25 \text{ m/s} \]

### Final Answer
The average speed of the car should be **25 meters per second**.

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