A herdsman yelling out to fellow herdsman heard his voice...
A herdsman yelling out to fellow herdsman heard his voice reflected by cliff 4s later. What is the velocity of sound in air if the cliff is 680m away?
170ms-1
136ms-1
340ms-1
680ms-1
510ms-1
Correct answer is C
Velocity = distancetime
echo time = halt total time
= 12 x 4 = 25
velocity = 6802
= 340ms-1