Question

A source of sound is travelling at 100/3 m s⁻¹ along a road,
towards a point A. When the source is 3 m away from A, a
person standing at a point O on a road perpendicular to the
track hears a sound of frequency n'. The distance of O from
A at that time is 4 m. If the original frequency is 640 Hz, then
the value of n' is (given : velocity of sound = 340 m s⁻¹)
(a) 620 Hz
(b) 680 Hz
(c) 720 Hz
(d) 840 Hz

Answer 1

Answer:

=680 Hz

Explanation:

Component of velocity of source towards O=vs  cosθ

Answer 2

Answer:

I need sme points to ask

Explanation:

Questin

As you are a mol  and cannt anser its ok