Question

A source of sound of frequency n and a listener aoach each other with a

Answer 1

n'=n\left [ \frac{v-v_{l}}{v+v_{A}} \right ]\Rightarrow n \left [ \frac{340-10}{340+10} \right ]= n'

n= 2068Hz

Frequency of sound when source & observer are moving away from each other -

\nu {}'= \nu _{0}.\frac{C-V_{0}}{C+V_{s}}

- wherein

I hope it will help you