Question

A stone is dropped into a well of depth 78.4 m. after 4.23 second the sound of stone is heard then find the velocity of sound in air

Answer 1

we know that speed = distance/time
so..velocity in air =78.4/4.23
Velocity in air= 18.5 m/s (approx.)
Hence velocity in air is 18.5 m/s






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