Question

The driver of a car travelling with speed 30 m/s towards a hill sound a horn of frequency 600 hz. if the velocity of sound in air is 30 m/s, the frequency of reflected sound as heard by driver is

Answer 1

$the \: answer \: is \: in \: picture$

Answer 2

Since both the source and observor are moving towards each other, the formula shd be frequency(V+Vo/V-Vs)

=600(330+30/330-30)

=600(360/300)

=720Hz