Which is more : a speer of 36 km/hr or a speed of 10.5m/sec ?

Answer

To determine which speed is greater between 36 km/hr and 10.5 m/sec, we need to convert one of the speeds so that both speeds are in the same unit. Here, we will convert 36 km/hr into meters per second (m/sec).

### Step-by-Step Solution:

1. **Convert 36 km/hr to m/sec**:
- We know that 1 kilometer = 1000 meters and 1 hour = 3600 seconds.
- To convert kilometers per hour to meters per second, we use the formula:
\[ \text{Speed in m/sec} = \text{Speed in km/hr} \times \frac{1000 \text{ m}}{1 \text{ km}} \times \frac{1 \text{ hr}}{3600 \text{ sec}} \]
- Applying this to our speed:
\[ 36 \text{ km/hr} = 36 \times \frac{1000}{3600} \]

2. **Simplify the conversion**:
- Calculate the fraction:
\[ \frac{1000}{3600} = \frac{10}{36} = \frac{1}{3.6} \]
- Now, multiply:
\[ 36 \times \frac{10}{36} = 10 \text{ m/sec} \]

3. **Compare the two speeds**:
- We now have two speeds to compare:
- 10 m/sec (converted from 36 km/hr)
- 10.5 m/sec (given)
- Clearly, 10.5 m/sec is greater than 10 m/sec.

4. **Conclusion**:
- Therefore, 10.5 m/sec is the greater speed.

### Final Answer:
The speed of 10.5 m/sec is more than the speed of 36 km/hr.

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