Same as the other person most likely would be 20 times louder as your answer
The answer is D.
Hope this helps and have a good day :D
If the circuit is open, then there will be no light or sound. No current will flow and no air will move.
To solve this problem we will apply the concept given by Pythagoras in the description of the lengths of the legs of a rectangular triangle and if equality against the square of the hypotenuse, that is

Here,
a, b = Legs of a triangle
c = Hypotenuse
According to the attached chart then we would have to

Substituting the given the lengths into the Pythagorean Theorem.

Therefore the distance x is 2830km.