A source of sound and a listener are approaching each other with a speed of 40ms^(-1)The apparent frequency of a note produced by the source is 400 Hz. Then its true frequency is (velocity of sound in air = 360 ms^(-1) )

A source of sound and a listener are approaching each other with a spe

1.	A source of sound and a listener are approaching each other with a speed of 40ms^(-1)The apparent frequency of a note produced by the source is 400 Hz. Then its true frequency is (velocity of sound in air = 360 ms^(-1) )
Answer» 320 HZ 400 Hz 360 Hz 420 Hz Solution :`f. = ((v + v_(0))/(v - v_(s))) f implies 400 = [(360 + 40)/(360 - 40)] f implies f = 320` Hz