What is the speed of sound in air?

In which medium sound travels fastest : air, water or steel?

Out of solids, liquids and gases :

(a) in which medium sound travels slowest?

(b) in which medium sound travels fastest?

Which of the following is the speed of sound in water and which in steel?

(a) 5000 m/s

(b) 1500 m/s

(c) 340 m/s

Name the organs of hearing in our body.