A postman goes with a speed of 36km/h what is the speed of postman in m/s?

Options

A. 4.5 m/s
B. 6 m/s
C. 10 m/s
D. can't be determined

Answer

To convert the speed of the postman from kilometers per hour (km/h) to meters per second (m/s), we can follow these steps:

### Step-by-Step Solution:

1. **Identify the speed in km/h**: The speed of the postman is given as 36 km/h.

2. **Convert kilometers to meters**:
- We know that 1 kilometer is equal to 1000 meters.
- Therefore, to convert kilometers to meters, we multiply by 1000.
\[ 36 \text{ km} = 36 \times 1000 \text{ m} = 36000 \text{ m} \]

3. **Convert hours to seconds**:
- We know that 1 hour is equal to 3600 seconds (since 1 hour = 60 minutes and 1 minute = 60 seconds).
\[ 1 \text{ hour} = 60 \times 60 = 3600 \text{ seconds} \]

4. **Calculate the speed in m/s**:
- Now, we can convert the speed from meters per hour to meters per second by dividing the total meters by the total seconds.
\[ \text{Speed in m/s} = \frac{36000 \text{ m}}{3600 \text{ s}} = 10 \text{ m/s} \]

5. **Final Result**:
- The speed of the postman in meters per second is 10 m/s.