Compute the speed of sound in steel rails of a railroad track. The 29.0 x 10 weight density of steel is 49019 fps, and the Young’s modulus of steel is inz. Note: 29.0x 10°in2 = 4176. - 4176.0x10°15/ 1.2 x10* ft's b. 1.4x10* F15 a. c. 1.6x10* ft O‘fs d. 1.8*10*ft