Physics

3e

t = sqrt( 2s/g) = sqrt( 2 * 67.6 / 9.8) = 3.71 + 0.02 s
Therefore the time of the sound is 0.2 + 0.02
v = s/t = 67.6/0.2 = 338 + 33 m/s
ie 305 < v < 371 m/s

@yashkapoor Sorry but I could not understand


@siddharthaghosh thanks