A gun is fired at a distance of 1.35 km from Mukul. She hears the sound after three seconds. The speed (in m/s) at which sound travels is:A500B450C675D525Answer: B. 450 Read Explanation: Distance = 1.35 km = 1350 mTime = 3 secondsSpeed of sound=DistanceTime=13503=450 m/s= \frac{\text{Distance}}{\text{Time}} = \frac{1350}{3} = 450 \text{ m/s}=TimeDistance=31350=450 m/sSpeed of sound = 450 m/s Read more in App