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.
Tweet Share Email. Up until midcentury, the fastest thing in the world, apart from light, was sound. Travelling at 343 meters per second (1230 kph or 767 mph), sound was faster than even the most devastating craft of war.