A speed of 55m/sec is the same as

Options

A. 198 km/hr
B. 11km/hr
C. 155/18 km/hr
D. 275 km/hr

Answer

To convert a speed of 55 meters per second (m/s) to kilometers per hour (km/h), we can follow these steps:

### Step 1: Understand the conversion factors
1 meter is equal to 0.001 kilometers, and 1 second is equal to 1/3600 hours.

### Step 2: Set up the conversion
To convert from m/s to km/h, we can use the following formula:
\[ \text{Speed in km/h} = \text{Speed in m/s} \times \frac{3600 \text{ seconds}}{1000 \text{ meters}} \]

### Step 3: Substitute the values
Substituting the given speed:
\[ \text{Speed in km/h} = 55 \, \text{m/s} \times \frac{3600}{1000} \]

### Step 4: Simplify the fraction
\[ \frac{3600}{1000} = 3.6 \]
So, we can rewrite the equation as:
\[ \text{Speed in km/h} = 55 \, \text{m/s} \times 3.6 \]

### Step 5: Calculate the final speed
Now, multiply:
\[ \text{Speed in km/h} = 55 \times 3.6 = 198 \, \text{km/h} \]

### Conclusion
Thus, a speed of 55 m/s is the same as 198 km/h.

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