Radiowaves travel at the speed of light, which is 3 X 10^8 m/s. If a certain radio station broadcasts at a frequency of 1191 kHz, what is the wavelength of these waves? in meters?

C=lamda V
lamda= v/c

so 1191/3e8

but it doesnt work..?

You have to convert kHz to Hz before you plug in your values. 1Hz=10^-3 KHz