The speed of sound in air is 330 m s-1
The speed of sound in water is 1450 m s-1
The speed of sound in steel is 5100 m s-1
Therefore, the comparison gives —
330 : 1450 : 5100
= 33 : 145 : 510
= 1 : 4 : 15
So approximately, the speed of sound in air, water and steel are in the ratio 1 : 4 : 15
