Rafeeq goes to trekking, and finds a cave. He shouts into it, and hear – InterviewSolution

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1.	Rafeeq goes to trekking, and finds a cave. He shouts into it, and hears his echo after 4.5 s. How long is the cave in km? Take the speed of sound in the air to be 340 m s−1.0.765
Answer» Rafeeq goes to trekking, and finds a cave. He shouts into it, and hears his echo after $4.5 s$ . How long is the cave in $km$ ? Take the speed of sound in the air to be $340 m s^{- 1}$ . 0.765

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