The speed of a car is 54km/hr. What is its speed in m/sec?

Options

A. 15m/sec
B. 19.44m/sec
C. 194.4m/sec
D. 150m/sec

Answer

To convert the speed of a car from kilometers per hour (km/hr) to meters per second (m/sec), we can follow these steps:

### Step-by-Step Solution:

1. **Identify the speed in km/hr**:
The speed of the car is given as 54 km/hr.

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.
\[ 54 \text{ km} = 54 \times 1000 \text{ m} = 54000 \text{ m} \]

3. **Convert hours to seconds**:
There are 3600 seconds in one hour (60 seconds in a minute and 60 minutes in an hour).
\[ 1 \text{ hour} = 60 \text{ minutes} \times 60 \text{ seconds/minute} = 3600 \text{ seconds} \]

4. **Calculate the speed in m/sec**:
To find the speed in meters per second, we divide the distance in meters by the time in seconds.
\[ \text{Speed in m/sec} = \frac{54000 \text{ m}}{3600 \text{ sec}} \]

5. **Simplify the fraction**:
\[ \frac{54000}{3600} = 15 \text{ m/sec} \]

### Final Answer:
The speed of the car in meters per second is **15 m/sec**.

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