Triangles Can be Solved Using: 1  Pythagoras's Theorem. 2  Sine Rule. 3  Cosine Rule. 4  Angles all add up to 180 degrees.
Report Abuse. sound travels fastest in solid substances. as in solids, the medium is denser and it aids the propogation of sound. sound will not travel in vaccum as they will not propogate if no material medium is present. in air it travels with the speed of 350 m/s which is less than the speed of sound in solids.
The speed of sound is the rate of travel of a sound wave through an elastic medium. In dry air at 20 Â°C (68 Â°F), the speed of sound is 343 meters per second (1,125 ft/s). Thâ¦is equates to 1,236 kilometers per hour (768 mph), or about one kilometer in three seconds and about one mile in five seconds.