The answer is; 272.72 meters
We know that the relationship between the frequency and wavelength of a wave is defined by the following equation; frequency =1/ lambda
1100kHz = 1100 * 10^3 Hz
Frequency * waveleght = speed of light (3 x 10^8 m/sec)
Therefore; 1100*10^3 = speed of light /lambda; lambda = speed of light /1100*10^3
Lambda = (3 x 10^8 m/sec)/ 1100*10^3
= 272.72 m