Q.

Speed of sound in solids is -

A. 10 times that in gas/ 10
B. 20 times that in gas/ 20
C. 5 times that in gas/ 5
D. 15 times that in gas/ 15
Answer» D. 15 times that in gas/ 15
Explanation: Sound travels at 343 m/s in air; it travels at 1,480 m/s in water (4.3 times as fast as in air); and at 5,120 m/s in iron (about 15 times as fast as in air).
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