A car and bike are moving in opposite directions on parallel tracks with speeds of 72 km/h and 60 km/h respectively. A boy sitting in car is continuously sounding a whistle of frequency 400 Hz. Calculate the frequency of sound heard by person sitting on bike
(a) if car and bike are approaching each other.
(b) if car and bike are moving away from each other.

A railway engine and a car are moving on parallel tracks in opposite directinos with speeds of 144km//hr and 72km//h respectively. The engine is continously sounding a whistle of frequency 500Hz. The velocity of sound in 340ms^(-1) . Calculate the frequency of sound heard in the car when (i) the car and engineare approaching one another, (ii) the two are moving away from one another.

Two car moving in opposite directions approach each other with speed of 22m//s and 16.5m//s respectively. The driver of the first car blows a horn having a frequency 400 Hz . The frequency heard by the driver of the second car is [velocity of sound 340m//s ].

Two cars moving in opposite directio approach each other with speed of 22m//s and 16.5m//s respectively . The driver of the first car blows a horn having a frequency 400Hz . The frequency heard by the driver of the second car is [ velocity of the sound 340m//s]

Two cars are moving in the same direction with the irrespective speeds of 9km/h and5km/h. Find the relative speed of 1st car with respect of 2nd.

Two engines pass each other moving in opposite directions with uniform speed of of them is blowing a whistle of frequency 540 Hz. Calculate the frequency heard by driver of second engine before they pass each other. Speed of sound is 300 m/sec :

Two cars P and Q are approaching each other with velocities of 36 km/h and 72 km/h respectively. The frequency of a note emitted by car P as heard by the person sitting in car Q is 850 Hz. What will be the frequency of note heard by person sitting in car P ? Velocity of sound = 340 m/s.

Two cars are approaching each other on a straight road and moving with a velocity of 30 kmh-1 . If the sound produced in a car is of frequency 500 Hz, what will be the frequency of sound as heard by the person sitting in the other car ? When the two cars have crossed each other and are moving away from each other, what will be the frequency of sound as heard by the same person ? Speed of sound= 330 ms^-1 .