Two persons A and B , in two cars, are moving in opposite direction away from each other with same speed 20ms- 1 . If frequency heard by A is 2000Hz , then original frequency of B is (velocity of sound is 340ms- 1 )

Question

Two persons A and B , in two cars, are moving in opposite direction away from each other with same speed 20ms- 1 . If frequency heard by A is 2000Hz , then original frequency of B is (velocity of sound is 340ms- 1 ) (A) 1950Hz (B) 2350Hz (C) 2250Hz (D) 2550Hz

Tardigrade Admin · Accepted Answer

n1=((v + vo/v - vs))n OR n1=((v - vo/v + vs))n

Q. Two persons $A$ and $B$ , in two cars, are moving in opposite direction away from each other with same speed $20 m s^{- 1}$ . If frequency heard by $A$ is $2000 Hz$ , then original frequency of $B$ is (velocity of sound is $340 m s^{- 1}$ )

$1950 Hz$

$2350 Hz$

$2250 Hz$

$2550 Hz$

$n^{1} = (\frac{v + v _{o}}{v - v _{s}}) n$ OR $n^{1} = (\frac{v - v _{o}}{v + v _{s}}) n$

Q. Two persons A and B , in two cars, are moving in opposite direction away from each other with same speed 20ms−1 . If frequency heard by A is 2000Hz , then original frequency of B is (velocity of sound is 340ms−1 )

1950Hz

2350Hz

2250Hz

2550Hz