Two cars A and B approach a stationary observer from opposite sides with the speed of 15m/s and 30 m/s respectively.The observer hears nobeats. If the frequency of the horn of the car B is 504 Hz , the frequency of the horn of the car A will be :

Two cars A and B approach a stationary observer from opposite sides wi

1.	Two cars A and B approach a stationary observer from opposite sides with the speed of 15m/s and 30 m/s respectively.The observer hears nobeats. If the frequency of the horn of the car B is 504 Hz , the frequency of the horn of the car A will be :
Answer» `440.5 HZ` `298.2 Hz` `529.2 Hz` NONE of these Solution :`{:("Apparent frequency of car A",):}}={("Apparent frequency of car B",):}` `(V)/(v-v_(s))xxv=(v)/(v-v_(s))xxv` `(v)/(v-15)=(504)/(v-30)` `v=(340-15)/(340-330)xx504` `=529.2 Hz`.