Question

1 Sound travels at the fastest speed in:
a) Vacuum.
b) Air.
c) Water.
d) Steel.

Answer 1

hey mate here is ur answer
steel

hope it helped you

Answer 2

Sounds are transmitted from one medium to another by vibrations of molecules. Since in solids the molecules are tightly held, hence the sound will travel faster in Steel.

Since, vacuum don't contain particle, it won't transmit the vibration and hence sound cannot travel.