Question

A sound wave travels equal distances through air, water, and aluminum. Which medium will it move through in the shortest time? A. The time will be the same.
B. Aluminum
C. Air
D. Water

Answer 1

air c. or aluminium B. because of the mediums comment make up it might travel faster

Answer 2

The medium in which it will move through in the shortest time will be the medium it travels the fastest.

And sound would travel the fastest in the densest.

The most dense is the Aluminum, hence sound would travel fastest in the Aluminum and it would travel in the shortest possible time in the Aluminum.

Option B Aluminum

Hope this explains it.