A person standing on an open ground hears the sound of a jet aeroplane, coming from north at an angle 60 o…

A person standing on an open ground hears the sound of a jet aeroplane, coming from north at an angle 60o with ground level, but he finds the aeroplane right vertically above his position. If v is the speed of sound, speed of the plane is:
  1. 2v3
  2. v
  3. v2
  4. 32v

Solution



dvs=d cos60ova

va=vs2=v2

Asked in: JEE Main 2019 (12 Jan Shift 1)

Practice more Mathematical Methods questions on Aicharya