An echo is heard after 0.8 s, when a person fires a cracker 132.8 m fr – McqOptions

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1.	An echo is heard after 0.8 s, when a person fires a cracker 132.8 m from a high building. What is the speed of sound?
A.	315 m/s
B.	332 m/s
C.	320 m/s
D.	310 m/s
Answer» C. 320 m/s

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