A car moving towards a vertical wall with a speed of 20ms^(-1) sounds a horn of frequency 765Hz .The wall is moving away from the car; their relative velocity of separation being 20ms^(-1) .Also there is a wind that is blowing in a direction from car towards the wall at a speed of 20ms^(-1) .The speed of sound in still air is 340ms^(-1) . The frequency of the echo of the horn received by the driver of the car is

A car moving towards a vertical wall with a speed of 20ms^(-1) sounds a horn of frequency 765Hz .The wall is moving away from the car their relative velocity of separation being 20ms^(-1) .Also there is a wind that is blowing in a direction from car towards the wall at a speed of 20ms^(-1) .The speed of sound in still air is 340ms^(-1) . The frequency of sound as observed by an ant sitting on the wall.

A car moving towards a vertical wall with a speed of 20ms^(-1) sounds a horn of frequency 765Hz .The wall is moving away from the car; their relative velocity of separation being 20ms^(-1) .Also there is a wind that is blowing in a direction from car towards the wall at a speed of 20ms^(-1) .The speed of sound in still air is 340ms^(-1) . The wavelength of sound waves returning towards the car after reflection from the wall is

A car with a horn of frequency 620 Hz travels towards a large wall with a speed of 20 ms ^(-1) velocity of sound is 330 ms ^(-1) The frequency of echo of sound of horn as heard by the driver is

A car, sounding a horn of frequency 1000 Hz, is moving directly towards a huge wall at a speed of 15 m/s. If speed of sound is 340 m/s, then the frequency of the echo heard by the driver is

An engine driver moving towards a wall with a velocity of 60 m/s emits a note of 1400 Hz. Speed of sound in air is 340 m/s .The frequency of the note after reflection from the wall as heard by the engine driver is

The frequency of a rod is 200 HZ. If the velocity of sound in air is 340ms^(-1) , the wavelength of the sound produced is

A car is moving with a constant velocity 10 m//s towards the stationary wall. The car blows a horn of frequency 320 Hz . The velocity of sound in air is 330 m//s . The beats frequency received by the observer is