In order for the radio receiver to be useful, it must discriminate between the two radio stations. Your company’s specifications state that when the radio is tuned to KUT, the sound volume of KMFA signals should be 100 times weaker. The volume is directly proportional to the power dissipated in the resistance of the speaker.
What resistance R should the speaker have in order for your design to just meet company specifications?
Answer in units of Ohms