A child watching Dussehra celebration from a distance sees the effigy of Ravana burst into flames and hears the explosion associated with it 2 s after that. How far was he from the effigy if the speed of sound in air that night was 335 m/s?

Options

A. 535 m
B. 670 m
C. 720 m
D. 420 m

Explanation

To solve the problem, we need to determine the distance between the child and the effigy of Ravana based on the time it took for the sound of the explosion to reach the child after he saw the flames.

### Step-by-Step Solution:

1. **Understand the Problem**:
- The child sees the explosion and hears the sound 2 seconds later.
- The speed of sound in air is given as 335 m/s.

2. **Identify the Time Delay**:
- The time delay between seeing the explosion and hearing the sound is 2 seconds. This means the sound took 2 seconds to travel from the effigy to the child.

3. **Use the Formula for Distance**:
- The formula to calculate distance when speed and time are known is:
\[ \text{Distance} = \text{Speed} \times \text{Time} \]

4. **Substitute the Known Values**:
- Here, the speed of sound (V) is 335 m/s and the time (T) is 2 seconds.
- Plugging in these values:
\[ \text{Distance} = 335 \, \text{m/s} \times 2 \, \text{s} \]

5. **Calculate the Distance**:
- Performing the multiplication:
\[ \text{Distance} = 670 \, \text{m} \]

6. **Conclusion**:
- The distance between the child and the effigy of Ravana is 670 meters.

### Final Answer:
The child was 670 meters away from the effigy.

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