40. A splash is heard 3.12s after a stone is dropped
into a well 45 m deep. The speed of sound i
air is (g = 10 ms?]
1) 330 ms?
2) 375 ms -1
3) 340 ms -1
4) 346 ms -1
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40. A splash is heard 3.12s after a stone is dropped
into a well 45 m deep. The speed of sound i
air is (g = 10 ms?]
1) 330 ms?
2) 375 ms -1
3) 340 ms -1
4) 346 ms -1
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