Question

a boy stands 80m in front of a tall cliff and produces sound by clapping two planks together. A girl standing next to him time the return of the echo at 0.5. how fast does sound wave travel in this place​

Answer 1

320 m/s

Step-by-step explanation:

Speed = Distance / Time

= 160m/0.5s

= 320 m/s

[Note: The distance is 160m as the sound travelled to the cliff before reflecting back. Hence it travelled 80 + 80 = 160 m]