A speed of 45 km per hour is the same as.
45 km/hr की गति किसके बराबर है?

Options

A. 12m/sec
B. 12.5 m/sec
C. 13 m/sec
D. 15 m/sec

Explanation

To convert a speed of 45 km per hour into meters per second, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Conversion Factors**:
- We know that 1 kilometer (km) is equal to 1000 meters (m).
- We also know that 1 hour (hr) is equal to 3600 seconds (s).

2. **Set Up the Conversion**:
- We need to convert 45 km/hr into m/s using the conversion factors.
- The formula for conversion is:
\[ \text{Speed in m/s} = \text{Speed in km/hr} \times \frac{1000 \text{ m}}{3600 \text{ s}} \]

3. **Substitute the Values**:
- Substitute 45 km/hr into the formula:
\[ \text{Speed in m/s} = 45 \times \frac{1000}{3600} \]

4. **Simplify the Fraction**:
- Simplify \(\frac{1000}{3600}\):
\[ \frac{1000}{3600} = \frac{100}{360} = \frac{5}{18} \]

5. **Calculate the Speed**:
- Now, substitute back into the equation:
\[ \text{Speed in m/s} = 45 \times \frac{5}{18} \]
- Calculate:
\[ = \frac{45 \times 5}{18} = \frac{225}{18} = 12.5 \text{ m/s} \]

### Final Answer:
The speed of 45 km per hour is the same as **12.5 meters per second**.

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