Question

A child hears an echo from a cliff 4 second after the sound from a powerful cracker is produced How far away is the cliff from the child? Velocity of sound in air at 20degree celsius is 344m/s PLease give the whole process properly

Answer 1

344x2=688 as because the sound will need the same time to come back. As because in 2 seconds it will go and in other 2 seconds it will return to him. So in 1 second it goes 344 meter so in 2 seconds it will go 688 meters