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 meter per second is

A. 60 m/s

B. 62 m/s

C. 64 m/s

D. 68 m/s

Answer: Option D

Solution(By Examveda Team)

$$\eqalign{ & {\text{Distance = 1}}{\text{.7 km}} \cr & {\text{Time = 25 sec}} \cr & \therefore {\text{Speed = }}\frac{{{\text{Distance}}}}{{{\text{Time }}}} \cr & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = \frac{{1.7 \times 1000}}{{25}} \cr & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = 68{\text{ m/s}} \cr} $$