The answer is 2.93m (to 2 dp)
The speed of sound is 340.29 meters per second.
Knowing that, we can calculate how high this cliff is by 340.29 * .4
The cliff is 340.29 * .4 = 136.12 meters
Sound waves require a medium to travel through. :D
On the opposite sides, the father would out weigh the sons weight, simply because he is bigger than the son
The definite answer is “the opposites side of the seesaw”
Hope this helps you ☁︎☀︎☁︎