MHT CET Physics question
A sound is produced between two vertical parallel walls. The echo from one wall is heard after 2 s while from the other 2 s after the first echo. The speed of sound in air is . Choose the correct option.
Answer: (B)
Solution
The first echo at 2 s gives a wall at m and the second echo at 4 s gives a wall at m, so the walls are m
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