The opera Problem

Level pending

Two men, one in opera house and other sitting at home near his radio, are listing to the same music. At what distance from the radio should the listener be in order to hear the sounds simultaneously with the man in the opera house sitting at a distance of 30m from the orchestra? (1) The velocity of sound = 340m/s. (2)The velocity of propagation radio waves = 3*10^10cm/s. (3)the distance of radio from the opera = 7500km

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