Answer :
Answer: Hallway is 20 m long
Explanation: assume speed of sound is 343 m/s in 20 C temperature.
Distance s= vt = 343 m/s· 0.057 s= 19,55 m
Answer: Hallway is 20 m long
Explanation: assume speed of sound is 343 m/s in 20 C temperature.
Distance s= vt = 343 m/s· 0.057 s= 19,55 m