Question

A clear echo is heard within 0.2 seconds when a person shouts by sitting at the ridge of a hill. Calculate the velocity of sound in air. The distance between the person and the hill is 33.2 m​

Answer 1

the sound takes 0.2 seconds to go to the hill and come back, so it would take 0.1 seconds to get to the hill. then v=d/t; v=33.2/0.1
v=332m/s