A person standing on an open ground hears the sound of a jet aeroplane

PHYSICS · Single correct · CBSE · Physics · Waves · Waves

Problem

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

60^\circ

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)

\frac{\sqrt{3}}{2}v

(2)

\frac{2v}{\sqrt{3}}

(3)

v

(4)

\frac{v}{2}