1. The problem statement, all variables and given/known data An important news announcement is transmitted by radio waves to people who are 81 km away, sitting next to their radios, and by sound waves to people sitting across the newsroom, 2.3 m from the newscaster. Take the speed of sound in air to be 343 m/s. What is the difference in time that the message is recieved? 2. Relevant equations c = f*lamda 3. The attempt at a solution c1 = 3*10^8 m/s lamda1 = 81km c2 = 343 m/s lamda2 = 2.3m f1 = c1/lamda1 f2 = c2/lamda2 T = 1/(f1-f2) = time difference What am I doing wrong? Thanks in advance for any help!