Question

A person standing 99m from the foot of a tall cliff claps his hands and hears the echo 0.6s later. calculate the velocity (speed)

Answer 1

Answer:

330 ms^-1

Explanation:

Total distance = 99m        Total time  = 0.6 sec

Therefore total distance covered by sound to go to cliff and  come back to boy after reflection from cliff, = 2d

2d = v x t  

==> 2 x 99 = v x 0.6

==> 198 / 0.6 = 330

==> v = 330 ms^-1

Hope you understand:)