A gun is fired at a distance of 1.7 km from Ram and he hears

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A gun is fired at a distance of 1.7 km from Ram and he hears the sound after 25 seconds. The speed of sound in metre per second is :

1. 60
2. 62
3. 64
4. 68

Correct Option: D

Using the given formula ,

Speed =	Distance
	Time

speed of sound =		1.7 × 1000		m./sec.
		25

Hence , speed of sound = 68 m./sec.